This invention provides a polymerizable compound represented by formula (I), a polymerizable composition containing the polymerizable compound and a polymerization initiator, a polymer produced by polymerizing the polymerizable compound or the polymerizable composition, and an optically anisotropic product comprising the polymer as a constituent material. In formula (1), Y.sup.1 to Y.sup.9 represent O, S, OC(O), C(O)O or the like, G.sup.1 and G.sup.2 represent a divalent linear aliphatic group having 1 to 20 carbon atoms or the like, Z.sup.1 to Z.sup.3 represent an alkenyl group having 2 to 10 carbon atoms or the like, A.sup.x represents a group represented by a formula (II), wherein X represents an oxygen atom, a sulfur atom or the like, D represents an alkylene group having 1 to 20 carbon atoms or the like, A.sup.1 represents a trivalent aromatic group or the like, A.sup.2 and A.sup.3 represent a divalent alicyclic hydrocarbon group having 3 to 30 carbon atoms or the like, A.sup.4 and A.sup.5 represent a divalent aromatic group having 4 to 30 carbon atoms or the like, Q.sup.1 represents an alkyl group having 1 to 6 carbon atoms or the like, and m and n are 0 or 1. ##STR00001##

This invention provides a polymerizable compound represented by formula (I), a polymerizable composition containing the polymerizable compound and a polymerization initiator, a polymer produced by polymerizing the polymerizable compound or the polymerizable composition, and an optically anisotropic product comprising the polymer as a constituent material. In formula (1), Y.sup.1 to Y.sup.9 represent O, S, OC(O), C(O)O or the like, G.sup.1 and G.sup.2 represent a divalent linear aliphatic group having 1 to 20 carbon atoms or the like, Z.sup.1 to Z.sup.3 represent an alkenyl group having 2 to 10 carbon atoms or the like, A.sup.x represents a group represented by a formula (II), wherein X represents an oxygen atom, a sulfur atom or the like, D represents an alkylene group having 1 to 20 carbon atoms or the like, A.sup.1 represents a trivalent aromatic group or the like, A.sup.2 and A.sup.3 represent a divalent alicyclic hydrocarbon group having 3 to 30 carbon atoms or the like, A.sup.4 and A.sup.5 represent a divalent aromatic group having 4 to 30 carbon atoms or the like, Q.sup.1 represents an alkyl group having 1 to 6 carbon atoms or the like, and m and n are 0 or 1. ##STR00001##