ギリシア文字拡張（ギリシアもじかくちょう、）は、Unicodeの72個目のブロック。
解説 ギリシャ文字のうち、古典ギリシャ語で用いられていた気息記号やアクセント記号などのダイアクリティカルマークの付いた文字を収録している。
Unicodeのバージョン1.1において初めて追加された。
収録文字 「ラテン文字転写」の列はギリシャ文字のラテン文字への翻字方式の一つであるISO 843に従う。 コード文字文字名（英語）用例・説明ラテン文字転写合成済み複声調ギリシャ文字U+1F00ἀGREEK SMALL LETTER ALPHA WITH PSILI無気記号（ギリシャ語：ψιλή）の付いたα。 [a]を表す。'aU+1F01ἁGREEK SMALL LETTER ALPHA WITH DASIA有気記号（ギリシャ語：δασεῖα）の付いたα。 [ha]を表す。haU+1F02ἂGREEK SMALL LETTER ALPHA WITH PSILI AND VARIA無気記号と鈍アクセント符号（ギリシャ語：βαρεία）の付いたα。 低い[à]を表す。'àU+1F03ἃGREEK SMALL LETTER ALPHA WITH DASIA AND VARIA有気記号と鈍アクセント符号の付いたα。 低い[hà]を表す。hàU+1F04ἄGREEK SMALL LETTER ALPHA WITH PSILI AND OXIA無気記号と鋭アクセント符号（ギリシャ語：οξεία ）の付いたα。 高い[á]を表す。'áU+1F05ἅGREEK SMALL LETTER ALPHA WITH DASIA AND OXIA有気記号と鋭アクセント符号の付いたα。 高い[há]を表す。háU+1F06ἆGREEK SMALL LETTER ALPHA WITH PSILI AND PERISPOMENI無気記号と（ギリシャ語：περισπωμένη）記号の付いたα。 下降声調を持つ[â]を表す。'âU+1F07ἇGREEK SMALL LETTER ALPHA WITH DASIA AND PERISPOMENI有気記号とペリスポメノン記号の付いたα。
下降声調を持つ[hâ]を表す。hâU+1F08ἈGREEK CAPITAL LETTER ALPHA WITH PSILI'AU+1F09ἉGREEK CAPITAL LETTER ALPHA WITH DASIAHaU+1F0AἊGREEK CAPITAL LETTER ALPHA WITH PSILI AND VARIA'ÀU+1F0BἋGREEK CAPITAL LETTER ALPHA WITH DASIA AND VARIAHàU+1F0CἌGREEK CAPITAL LETTER ALPHA WITH PSILI AND OXIA'ÁU+1F0DἍGREEK CAPITAL LETTER ALPHA WITH DASIA AND OXIAHáU+1F0EἎGREEK CAPITAL LETTER ALPHA WITH PSILI AND PERISPOMENI'ÂU+1F0FἏGREEK CAPITAL LETTER ALPHA WITH DASIA AND PERISPOMENIHâU+1F10ἐGREEK SMALL LETTER EPSILON WITH PSILI'eU+1F11ἑGREEK SMALL LETTER EPSILON WITH DASIAheU+1F12ἒGREEK SMALL LETTER EPSILON WITH PSILI AND VARIA'èU+1F13ἓGREEK SMALL LETTER EPSILON WITH DASIA AND VARIAhèU+1F14ἔGREEK SMALL LETTER EPSILON WITH PSILI AND OXIA'éU+1F15ἕGREEK SMALL LETTER EPSILON WITH DASIA AND OXIAhéU+1F16（予約済）'êU+1F17（予約済）hêU+1F18ἘGREEK CAPITAL LETTER EPSILON WITH PSILI'EU+1F19ἙGREEK CAPITAL LETTER EPSILON WITH DASIAHeU+1F1AἚGREEK CAPITAL LETTER EPSILON WITH PSILI AND VARIA'ÈU+1F1BἛGREEK CAPITAL LETTER EPSILON WITH DASIA AND VARIAHèU+1F1CἜGREEK CAPITAL LETTER EPSILON WITH PSILI AND OXIA'ÉU+1F1DἝGREEK CAPITAL LETTER EPSILON WITH DASIA AND OXIAHéU+1F1E（予約済）'ÊU+1F1F（予約済）HêU+1F20ἠGREEK SMALL LETTER ETA WITH PSILI'īU+1F21ἡGREEK SMALL LETTER ETA WITH DASIAhīU+1F22ἢGREEK SMALL LETTER ETA WITH PSILI AND VARIA'ī̀U+1F23ἣGREEK SMALL LETTER ETA WITH DASIA AND VARIAhī̀U+1F24ἤGREEK SMALL LETTER ETA WITH PSILI AND OXIA'ī́U+1F25ἥGREEK SMALL LETTER ETA WITH DASIA AND OXIAhī́U+1F26ἦGREEK SMALL LETTER ETA WITH PSILI AND PERISPOMENI'ī̂U+1F27ἧGREEK SMALL LETTER ETA WITH DASIA AND PERISPOMENIhī̂U+1F28ἨGREEK CAPITAL LETTER ETA WITH PSILI'ĪU+1F29ἩGREEK CAPITAL LETTER ETA WITH DASIAHīU+1F2AἪGREEK CAPITAL LETTER ETA WITH PSILI AND VARIA'Ī̀U+1F2BἫGREEK CAPITAL LETTER ETA WITH DASIA AND VARIAHī̀U+1F2CἬGREEK CAPITAL LETTER ETA WITH PSILI AND OXIA'Ī́U+1F2DἭGREEK CAPITAL LETTER ETA WITH DASIA AND OXIAHī́U+1F2EἮGREEK CAPITAL LETTER ETA WITH PSILI AND PERISPOMENI'Ī̂U+1F2FἯGREEK CAPITAL LETTER ETA WITH DASIA AND PERISPOMENIHī̂U+1F30ἰGREEK SMALL LETTER IOTA WITH PSILI'iU+1F31ἱGREEK SMALL LETTER IOTA WITH DASIAhiU+1F32ἲGREEK SMALL LETTER IOTA WITH PSILI AND VARIA'ìU+1F33ἳGREEK SMALL LETTER IOTA WITH DASIA AND VARIAhìU+1F34ἴGREEK SMALL LETTER IOTA WITH PSILI AND OXIA'íU+1F35ἵGREEK SMALL LETTER IOTA WITH DASIA AND OXIAhíU+1F36ἶGREEK SMALL LETTER IOTA WITH PSILI AND PERISPOMENI'îU+1F37ἷGREEK SMALL LETTER IOTA WITH DASIA AND PERISPOMENIhîU+1F38ἸGREEK CAPITAL LETTER IOTA WITH PSILI'IU+1F39ἹGREEK CAPITAL LETTER IOTA WITH DASIAHiU+1F3AἺGREEK CAPITAL LETTER IOTA WITH PSILI AND VARIA'ÌU+1F3BἻGREEK CAPITAL LETTER IOTA WITH DASIA AND VARIAHìU+1F3CἼGREEK CAPITAL LETTER IOTA WITH PSILI AND OXIA'ÍU+1F3DἽGREEK CAPITAL LETTER IOTA WITH DASIA AND OXIAHíU+1F3EἾGREEK CAPITAL LETTER IOTA WITH PSILI AND PERISPOMENI'ÎU+1F3FἿGREEK CAPITAL LETTER IOTA WITH DASIA AND PERISPOMENIHîU+1F40ὀGREEK SMALL LETTER OMICRON WITH PSILI'oU+1F41ὁGREEK SMALL LETTER OMICRON WITH DASIAhoU+1F42ὂGREEK SMALL LETTER OMICRON WITH PSILI AND VARIA'òU+1F43ὃGREEK SMALL LETTER OMICRON WITH DASIA AND VARIAhòU+1F44ὄGREEK SMALL LETTER OMICRON WITH PSILI AND OXIA'óU+1F45ὅGREEK SMALL LETTER OMICRON WITH DASIA AND OXIAhóU+1F46（予約済）'ôU+1F47（予約済）hôU+1F48ὈGREEK CAPITAL LETTER OMICRON WITH PSILI'OU+1F49ὉGREEK CAPITAL LETTER OMICRON WITH DASIAHoU+1F4AὊGREEK CAPITAL LETTER OMICRON WITH PSILI AND VARIA'ÒU+1F4BὋGREEK CAPITAL LETTER OMICRON WITH DASIA AND VARIAHòU+1F4CὌGREEK CAPITAL LETTER OMICRON WITH PSILI AND OXIA'ÓU+1F4DὍGREEK CAPITAL LETTER OMICRON WITH DASIA AND OXIAHóU+1F4E（予約済）'ÔU+1F4F（予約済）HôU+1F50ὐGREEK SMALL LETTER UPSILON WITH PSILI'yU+1F51ὑGREEK SMALL LETTER UPSILON WITH DASIAhyU+1F52ὒGREEK SMALL LETTER UPSILON WITH PSILI AND VARIA'ỳU+1F53ὓGREEK SMALL LETTER UPSILON WITH DASIA AND VARIAhỳU+1F54ὔGREEK SMALL LETTER UPSILON WITH PSILI AND OXIA'ýU+1F55ὕGREEK SMALL LETTER UPSILON WITH DASIA AND OXIAhýU+1F56ὖGREEK SMALL LETTER UPSILON WITH PSILI AND PERISPOMENI'ŷU+1F57ὗGREEK SMALL LETTER UPSILON WITH DASIA AND PERISPOMENIhŷU+1F58（予約済）'YU+1F59ὙGREEK CAPITAL LETTER UPSILON WITH DASIAHyU+1F5A（予約済）'ỲU+1F5BὛGREEK CAPITAL LETTER UPSILON WITH DASIA AND VARIAHỳU+1F5C（予約済）'ÝU+1F5DὝGREEK CAPITAL LETTER UPSILON WITH DASIA AND OXIAHýU+1F5E（予約済）'ŶU+1F5FὟGREEK CAPITAL LETTER UPSILON WITH DASIA AND PERISPOMENIHŷU+1F60ὠGREEK SMALL LETTER OMEGA WITH PSILI'ōU+1F61ὡGREEK SMALL LETTER OMEGA WITH DASIAhōU+1F62ὢGREEK SMALL LETTER OMEGA WITH PSILI AND VARIA'ṑU+1F63ὣGREEK SMALL LETTER OMEGA WITH DASIA AND VARIAhṑU+1F64ὤGREEK SMALL LETTER OMEGA WITH PSILI AND OXIA'ṓU+1F65ὥGREEK SMALL LETTER OMEGA WITH DASIA AND OXIAhṓU+1F66ὦGREEK SMALL LETTER OMEGA WITH PSILI AND PERISPOMENI'ō̂U+1F67ὧGREEK SMALL LETTER OMEGA WITH DASIA AND PERISPOMENIhō̂U+1F68ὨGREEK CAPITAL LETTER OMEGA WITH PSILI'ŌU+1F69ὩGREEK CAPITAL LETTER OMEGA WITH DASIAHōU+1F6AὪGREEK CAPITAL LETTER OMEGA WITH PSILI AND VARIA'ṐU+1F6BὫGREEK CAPITAL LETTER OMEGA WITH DASIA AND VARIAHṑU+1F6CὬGREEK CAPITAL LETTER OMEGA WITH PSILI AND OXIA'ṒU+1F6DὭGREEK CAPITAL LETTER OMEGA WITH DASIA AND OXIAHṓU+1F6EὮGREEK CAPITAL LETTER OMEGA WITH PSILI AND PERISPOMENI'Ō̂U+1F6FὯGREEK CAPITAL LETTER OMEGA WITH DASIA AND PERISPOMENIHō̂U+1F70ὰGREEK SMALL LETTER ALPHA WITH VARIAàU+1F71άGREEK SMALL LETTER ALPHA WITH OXIAáU+1F72ὲGREEK SMALL LETTER EPSILON WITH VARIAèU+1F73έGREEK SMALL LETTER EPSILON WITH OXIAéU+1F74ὴGREEK SMALL LETTER ETA WITH VARIAī̀U+1F75ήGREEK SMALL LETTER ETA WITH OXIAī́U+1F76ὶGREEK SMALL LETTER IOTA WITH VARIAìU+1F77ίGREEK SMALL LETTER IOTA WITH OXIAíU+1F78ὸGREEK SMALL LETTER OMICRON WITH VARIAòU+1F79όGREEK SMALL LETTER OMICRON WITH OXIAóU+1F7AὺGREEK SMALL LETTER UPSILON WITH VARIAỳU+1F7BύGREEK SMALL LETTER UPSILON WITH OXIAýU+1F7CὼGREEK SMALL LETTER OMEGA WITH VARIAṑU+1F7DώGREEK SMALL LETTER OMEGA WITH OXIAṓU+1F7E（予約済）U+1F7F（予約済）U+1F80ᾀGREEK SMALL LETTER ALPHA WITH PSILI AND YPOGEGRAMMENI無気記号と下書きのイオータの付いたα。 [aːi]を表す。'a̧U+1F81ᾁGREEK SMALL LETTER ALPHA WITH DASIA AND YPOGEGRAMMENIha̧U+1F82ᾂGREEK SMALL LETTER ALPHA WITH PSILI AND VARIA AND YPOGEGRAMMENI'à̧U+1F83ᾃGREEK SMALL LETTER ALPHA WITH DASIA AND VARIA AND YPOGEGRAMMENIhà̧U+1F84ᾄGREEK SMALL LETTER ALPHA WITH PSILI AND OXIA AND YPOGEGRAMMENIá̧U+1F85ᾅGREEK SMALL LETTER ALPHA WITH DASIA AND OXIA AND YPOGEGRAMMENIhá̧U+1F86ᾆGREEK SMALL LETTER ALPHA WITH PSILI AND PERISPOMENI AND YPOGEGRAMMENIâ̧U+1F87ᾇGREEK SMALL LETTER ALPHA WITH DASIA AND PERISPOMENI AND YPOGEGRAMMENIhâ̧U+1F88ᾈGREEK CAPITAL LETTER ALPHA WITH PSILI AND PROSGEGRAMMENI'A̧U+1F89ᾉGREEK CAPITAL LETTER ALPHA WITH DASIA AND PROSGEGRAMMENIHa̧U+1F8AᾊGREEK CAPITAL LETTER ALPHA WITH PSILI AND VARIA AND PROSGEGRAMMENI'À̧U+1F8BᾋGREEK CAPITAL LETTER ALPHA WITH DASIA AND VARIA AND PROSGEGRAMMENIHà̧U+1F8CᾌGREEK CAPITAL LETTER ALPHA WITH PSILI AND OXIA AND PROSGEGRAMMENI'Á̧U+1F8DᾍGREEK CAPITAL LETTER ALPHA WITH DASIA AND OXIA AND PROSGEGRAMMENIHá̧U+1F8EᾎGREEK CAPITAL LETTER ALPHA WITH PSILI AND PERISPOMENI AND PROSGEGRAMMENI'Â̧U+1F8FᾏGREEK CAPITAL LETTER ALPHA WITH DASIA AND PERISPOMENI AND PROSGEGRAMMENIHâ̧U+1F90ᾐGREEK SMALL LETTER ETA WITH PSILI AND YPOGEGRAMMENI無気記号と下書きのイオータの付いたη。
[ɛːi]を表す。'ī̧U+1F91ᾑGREEK SMALL LETTER ETA WITH DASIA AND YPOGEGRAMMENIhī̧U+1F92ᾒGREEK SMALL LETTER ETA WITH PSILI AND VARIA AND YPOGEGRAMMENI'ī̧̀U+1F93ᾓGREEK SMALL LETTER ETA WITH DASIA AND VARIA AND YPOGEGRAMMENIhī̧̀U+1F94ᾔGREEK SMALL LETTER ETA WITH PSILI AND OXIA AND YPOGEGRAMMENI'ī̧́U+1F95ᾕGREEK SMALL LETTER ETA WITH DASIA AND OXIA AND YPOGEGRAMMENIhī̧́U+1F96ᾖGREEK SMALL LETTER ETA WITH PSILI AND PERISPOMENI AND YPOGEGRAMMENI'ī̧̂U+1F97ᾗGREEK SMALL LETTER ETA WITH DASIA AND PERISPOMENI AND YPOGEGRAMMENIhī̧̂U+1F98ᾘGREEK CAPITAL LETTER ETA WITH PSILI AND PROSGEGRAMMENI'Ī̧U+1F99ᾙGREEK CAPITAL LETTER ETA WITH DASIA AND PROSGEGRAMMENIHī̧U+1F9AᾚGREEK CAPITAL LETTER ETA WITH PSILI AND VARIA AND PROSGEGRAMMENI'Ī̧̀U+1F9BᾛGREEK CAPITAL LETTER ETA WITH DASIA AND VARIA AND PROSGEGRAMMENIHī̧̀U+1F9CᾜGREEK CAPITAL LETTER ETA WITH PSILI AND OXIA AND PROSGEGRAMMENI'Ī̧́U+1F9DᾝGREEK CAPITAL LETTER ETA WITH DASIA AND OXIA AND PROSGEGRAMMENIHī̧́U+1F9EᾞGREEK CAPITAL LETTER ETA WITH PSILI AND PERISPOMENI AND PROSGEGRAMMENI'Ī̧̂U+1F9FᾟGREEK CAPITAL LETTER ETA WITH DASIA AND PERISPOMENI AND PROSGEGRAMMENIHī̧̂U+1FA0ᾠGREEK SMALL LETTER OMEGA WITH PSILI AND YPOGEGRAMMENI無気記号と下書きのイオータの付いたω。
[ɔːi]を表す。'ō̧U+1FA1ᾡGREEK SMALL LETTER OMEGA WITH DASIA AND YPOGEGRAMMENIhō̧U+1FA2ᾢGREEK SMALL LETTER OMEGA WITH PSILI AND VARIA AND YPOGEGRAMMENI'ṑ̧U+1FA3ᾣGREEK SMALL LETTER OMEGA WITH DASIA AND VARIA AND YPOGEGRAMMENIhṑ̧U+1FA4ᾤGREEK SMALL LETTER OMEGA WITH PSILI AND OXIA AND YPOGEGRAMMENI'ṓ̧U+1FA5ᾥGREEK SMALL LETTER OMEGA WITH DASIA AND OXIA AND YPOGEGRAMMENIhṓ̧U+1FA6ᾦGREEK SMALL LETTER OMEGA WITH PSILI AND PERISPOMENI AND YPOGEGRAMMENI'ō̧̂U+1FA7ᾧGREEK SMALL LETTER OMEGA WITH DASIA AND PERISPOMENI AND YPOGEGRAMMENIhō̧̂U+1FA8ᾨGREEK CAPITAL LETTER OMEGA WITH PSILI AND PROSGEGRAMMENI'Ō̧U+1FA9ᾩGREEK CAPITAL LETTER OMEGA WITH DASIA AND PROSGEGRAMMENIHō̧U+1FAAᾪGREEK CAPITAL LETTER OMEGA WITH PSILI AND VARIA AND PROSGEGRAMMENI'Ṑ̧U+1FABᾫGREEK CAPITAL LETTER OMEGA WITH DASIA AND VARIA AND PROSGEGRAMMENIHṑ̧U+1FACᾬGREEK CAPITAL LETTER OMEGA WITH PSILI AND OXIA AND PROSGEGRAMMENI'Ṓ̧U+1FADᾭGREEK CAPITAL LETTER OMEGA WITH DASIA AND OXIA AND PROSGEGRAMMENIHṓ̧U+1FAEᾮGREEK CAPITAL LETTER OMEGA WITH PSILI AND PERISPOMENI AND PROSGEGRAMMENI'Ō̧̂U+1FAFᾯGREEK CAPITAL LETTER OMEGA WITH DASIA AND PERISPOMENI AND PROSGEGRAMMENIHō̧̂U+1FB0ᾰGREEK SMALL LETTER ALPHA WITH VRACHYブレーヴェの付いたα。 短い[ă]を表す。ăU+1FB1ᾱGREEK SMALL LETTER ALPHA WITH MACRONマクロンの付いたα。 長い[aː]を表す。āU+1FB2ᾲGREEK SMALL LETTER ALPHA WITH VARIA AND YPOGEGRAMMENIà̧U+1FB3ᾳGREEK SMALL LETTER ALPHA WITH YPOGEGRAMMENIa̧U+1FB4ᾴGREEK SMALL LETTER ALPHA WITH OXIA AND YPOGEGRAMMENIá̧U+1FB5（予約済）U+1FB6ᾶGREEK SMALL LETTER ALPHA WITH PERISPOMENIâU+1FB7ᾷGREEK SMALL LETTER ALPHA WITH PERISPOMENI AND YPOGEGRAMMENIâ̧U+1FB8ᾸGREEK CAPITAL LETTER ALPHA WITH VRACHYĂU+1FB9ᾹGREEK CAPITAL LETTER ALPHA WITH MACRONĀU+1FBAᾺGREEK CAPITAL LETTER ALPHA WITH VARIAÀU+1FBBΆGREEK CAPITAL LETTER ALPHA WITH OXIAÁU+1FBCᾼGREEK CAPITAL LETTER ALPHA WITH PROSGEGRAMMENIA̧U+1FBD᾽GREEK KORONISコロニス（ギリシャ語：κορωνίς）。と呼ばれる、二重母音が1つの新しい母音または二重母音に融合する現象によって、短縮された母音の上に書かれる記号。