Copolymer, piezoelectric material, piezoelectric film, and piezoelectric element

A copolymer comprising:

• a structural unit including a triazole skeleton;
• and
• a structural unit represented by following Formula (2),
• wherein the structural unit including a triazole skeleton is any one or more of following General Formula (1-1) to General Formula (1-3),
• (in the General Formula (1-1) to the General Formula (1-3), R1 to R6 are each any one selected from the group consisting of a hydrogen atom, a methyl group, a trifluoromethyl group, a nitrile group, a fluorine atom, a methoxy group, an ethyl group, an ethoxy group, a methoxymethyl group, a propyl group, an isopropyl group, a cyclopropyl group, a butyl group, an isobutyl group, a (trimethyl)methyl group, a (trimethyl) silyl group, a pentyl group, an isopentyl group, a t-pentyl group, a neopentyl group, a cyclopentyl group, a hexyl group, a cyclohexyl group, a phenyl group, a tolyl group, a benzyl group, and a phenoxymethyl group, or R1 to R6 each form a benzotriazole skeleton together with a triazole ring).