This polymerizable compound is represented by a formula (I), this polymerizable composition contains said polymerizable compound and a polymerization initiator, this polymer is obtained by polymerizing the polymerizable compound or polymerizable composition, and this optically anisotropic product is comprised from the polymer. In the formula, each of Y1 to Y8 represents —O—, —S—, —O—C(═O)—, —C(═O)—O—, etc., Ya represents —O—, —S—, —O—C(═O)—, —C(═O)—O—, etc., each of G1 and G2 represents a divalent linear aliphatic group having 1 to 20 carbon atoms, etc., each of Z1 and Z2 represents an alkenyl group having 2 to 10 carbon atoms, etc., Ax represents an organic group having an aromatic ring and 2 to 30 carbon atoms, A1 represents a trivalent aromatic group, etc., each of A2 and A3 represents a divalent alicyclic hydrocarbon group having 3 to 30 carbon atoms, each of A4 and A5 represents a divalent aromatic group having 4 to 30 carbon atoms, etc., Q1 represents an alkyl group having 1 to 6 carbon atoms, etc., and each of m and n represents 0 or 1.