An optical film, a polarizing plate, and an image display device, each having an optically anisotropic layer obtained by curing a polymerizable liquid crystal composition including a polymerizable liquid crystal compound (LCC) having forward wavelength dispersion and a monofunctional compound, and immobilizing an alignment state of the polymerizable LCC. The number a1 of atoms of the polymerizable LCC and the number a2 of atoms of the monofunctional compound satisfy a relationship of Expression (1): 0.2