An optical film comprising a plurality of optically anisotropic layers which are laminated, wherein the optically anisotropic layers each comprise: a photoalignment layer (A, 11), in which a liquid crystal aligning capability has been generated by means of photoirradiation; and a polymer layer (B, 12), which contains a liquid crystal compound that has a polymerizable group, and which is obtained by polymerization in a state where it has been aligned by the photoalignment layer (A, 11), wherein the photoalignment layer (A, 11) and the polymer layer (B, 12) are bonded by covalent bonding, and wherein the optical film is obtained by a process comprising a step a for forming a photoaligning polymerizable composition layer by applying and drying a photoaligning polymerizable composition containing a compound having a photoaligning group and a polymerizable group, or a compound having a photoaligning group and a polymerizable compound; a step b for imparting a liquid crystal aligning capability by irradiating a polarized light of a wavelength that would be absorbed by the photoaligning group, or a non-polarized light from a diagonal direction with respect to a substrate; a step c for forming a polymerizable liquid crystal composition layer containing a polymerizable liquid crystal composition that contains a liquid crystal compound having a polymerizable group at the top of the layer; and a step d for advancing the curing of the both layers at the same time as polymerizing the polymerizable groups of the both layers by applying radiation or heat to the two layers that have been laminated, in this order, a plurality of times, wherein, from the second time on, the process is carried out by applying the photoaligning polymerizable composition layer on the optically anisotropic layer obtained the previous time. a photoalignment layer (A, 11), in which a liquid crystal aligning capability has been generated by means of photoirradiation; and a polymer layer (B, 12), which contains a liquid crystal compound that has a polymerizable group, and which is obtained by polymerization in a state where it has been aligned by the photoalignment layer (A, 11), wherein the photoalignment layer (A, 11) and the polymer layer (B, 12) are bonded by covalent bonding, and wherein the optical film is obtained by a process comprising a step a for forming a photoaligning polymerizable composition layer by applying and drying a photoaligning polymerizable composition containing a compound having a photoaligning group and a polymerizable group, or a compound having a photoaligning group and a polymerizable compound; a step b for imparting a liquid crystal aligning capability by irradiating a polarized light of a wavelength that would be absorbed by the photoaligning group, or a non-polarized light from a diagonal direction with respect to a substrate; a step c for forming a polymerizable liquid crystal composition layer containing a polymerizable liquid crystal composition that contains a liquid crystal compound having a polymerizable group at the top of the layer; and a step d for advancing the curing of the both layers at the same time as polymerizing the polymerizable groups of the both layers by applying radiation or heat to the two layers that have been laminated, in this order, a plurality of times, wherein, from the second time on, the process is carried out by applying the photoaligning polymerizable composition layer on the optically anisotropic layer obtained the previous time.