A curable composition comprising: a polymerizable compound which is one or more compounds selected from the group consisting of an epoxy compound and a vinyl ether compound; a reactive compound which is one or more compounds selected from the group consisting of a compound having one or more functional groups selected from a hydroxyl group and a carboxyl group and a polyvalent carboxylic anhydride; a compound represented by the following formula; and a compound represented by the following formula, wherein in the formula, R c1, R c2, and R c3 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a mercapto group, a sulfide group, a silyl group, a silanol group, a nitro group, a nitroso group, a sulfonate group, a phosphino group, a phosphinyl group, a phosphonate group, or an organic group; R c4 and R c5 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a mercapto group, a sulfide group, a silyl group, a silanol group, a nitro group, a nitroso group, a sulfino group, a sulfo group, a sulfonate group, a phosphino group, a phosphinyl group, a phosphono group, a phosphonate group, or an organic group; and Ar represents an aromatic group which may have a substituent, wherein in the formula, R d1 represents an aliphatic hydrocarbon group having 1 to 10 carbon atoms which may have a substituent or an aryl group which may have a substituent; R d2 represents an aliphatic hydrocarbon group having 1 to 10 carbon atoms or an aryl group which may have a substituent; R d3 represents a hydrogen atom or a group represented by -CO-R d5; R d5 represents an alkyl group having 1 to 6 carbon atoms or an aryl group which may have a substituent; and p represents 0 or 1. a polymerizable compound which is one or more compounds selected from the group consisting of an epoxy compound and a vinyl ether compound; a reactive compound which is one or more compounds selected from the group consisting of a compound having one or more functional groups selected from a hydroxyl group and a carboxyl group and a polyvalent carboxylic anhydride; a compound represented by the following formula; and a compound represented by the following formula, wherein in the formula, R c1, R c2, and R c3 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a mercapto group, a sulfide group, a silyl group, a silanol group, a nitro group, a nitroso group, a sulfonate group, a phosphino group, a phosphinyl group, a phosphonate group, or an organic group; R c4 and R c5 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a mercapto group, a sulfide group, a silyl group, a silanol group, a nitro group, a nitroso group, a sulfino group, a sulfo group, a sulfonate group, a phosphino group, a phosphinyl group, a phosphono group, a phosphonate group, or an organic group; and Ar represents an aromatic group which may have a substituent, wherein in the formula, R d1 represents an aliphatic hydrocarbon group having 1 to 10 carbon atoms which may have a substituent or an aryl group which may have a substituent; R d2 represents an aliphatic hydrocarbon group having 1 to 10 carbon atoms or an aryl group which may have a substituent; R d3 represents a hydrogen atom or a group represented by -CO-R d5; R d5 represents an alkyl group having 1 to 6 carbon atoms or an aryl group which may have a substituent; and p represents 0 or 1.