The present invention relates to : a polymerizable compound (1), wherein Y 1 to Y 6 are a chemical single bond, -O-C(=O)-, -C(=O)-O- or the like, G 1 and G 2 are a divalent aliphatic group having 1 to 20 carbon atoms or the like, Z 1 and Z 2 are an alkenyl group having 2 to 10 carbon atoms that is unsubstituted or substituted with a halogen atom, A x is a fused ring group represented by a formula (II), wherein X is -NR 3 -, an oxygen atom, a sulfur atom or the like, R 3 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and D is a substituted or unsubstituted ring having 1 to 20 carbon atoms that includes at least one nitrogen atom, A y is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms or the like, A 1 is a trivalent aromatic group or the like, A 2 and A 3 are a divalent aromatic group having 6 to 30 carbon atoms or the like, and Q 1 is a hydrogen atom, or an alkyl group having 1 to 6 carbon atoms. The present invention provides a polymerizable compound, a polymerizable composition, and a polymer that have a practical low melting point, exhibit excellent solubility in a general-purpose solvent, can be produced at low cost, and can produce an optical film that achieves uniform conversion of polarized light over a wide wavelength band, and an optically anisotropic article.