TWI771452B

An object of the present invention is to provide a piezoelectric material having excellent flexibility and elasticity, and a piezoelectric material composition for obtaining the piezoelectric material. To achieve the object, the piezoelectric material of the present invention includes a vinylidene-fluoride/trifluoroethylene copolymer; and an acrylic elastomer, which contains a structural unit derived from an acrylic monomer represented by formula (I) and has a weight average molecular weight of 1,000,000 or more. In formula (I), R represents an alkyl group having 1 to 10 carbon atoms which is optionally substituted by a hydroxylgroup, an alkyl group having 1 or 2 carbon atoms and/or an alkoxy group having 1 to 6 carbon atoms; a hydrocarbon group having 3 to 12 carbon atoms and including an alicyclic hydrocarbon group which has 3 to 6 carbon atoms in which at least one carbon atom is optionally substituted by an oxygen atom; a phenylalkylene group in which an alkylene moiety has 1 to 4 carbon atoms and one -CH