A polymerizable composition comprising: a) a polymerizable compound having one polymerizable group or two or more polymerizable groups and satisfying formula Re 450 nm / Re 550 nm < 1.0 wherein Re(450 nm) is an in-plane retardation at a wavelength of 450 nm when the polymerizable compound having one polymerizable group is aligned on a substrate such that the direction of long axes of molecules of the polymerizable compound is substantially horizontal to the substrate, and Re(550 nm) is an in-plane retardation at a wavelength of 550 nm when the polymerizable compound having one polymerizable group is aligned on the substrate such that the direction of the long axes of the molecules of the polymerizable compound is substantially horizontal to the substrate; and b) at least one fluorine-based surfactant selected from the group consisting of copolymers having a weight average molecular weight of 2,500 to 30,000, as determined by Gel Permeation Chromatography under the conditions disclosed in the description, and each obtained by copolymerizing essential monomers including a polymerizable monomer containing a fluorine atom and a polymerizable monomer represented by general formula, having a solubility parameter (SP value) of 8.9 to 10.5 (cal/cm 3) 0-5, as calculated by the method disclosed in the description, and satisfying the following formula: 1.00 < 100 × s + t + u / MB < 2.10 wherein s is an integer of 1 or more; t and u are each an integer of 0 or 1 or more; and MB is the molecular weight of the polymerizable monomer represented by general formula): (wherein R is a hydrogen atom or a methyl group; X, Y, and Z are each independently an alkylene group; s is an integer of 1 or more; t and u are each an integer of 0 or 1 or more; and W is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group. a) a polymerizable compound having one polymerizable group or two or more polymerizable groups and satisfying formula Re 450 nm / Re 550 nm < 1.0 wherein Re(450 nm) is an in-plane retardation at a wavelength of 450 nm when the polymerizable compound having one polymerizable group is aligned on a substrate such that the direction of long axes of molecules of the polymerizable compound is substantially horizontal to the substrate, and Re(550 nm) is an in-plane retardation at a wavelength of 550 nm when the polymerizable compound having one polymerizable group is aligned on the substrate such that the direction of the long axes of the molecules of the polymerizable compound is substantially horizontal to the substrate; and b) at least one fluorine-based surfactant selected from the group consisting of copolymers having a weight average molecular weight of 2,500 to 30,000, as determined by Gel Permeation Chromatography under the conditions disclosed in the description, and each obtained by copolymerizing essential monomers including a polymerizable monomer containing a fluorine atom and a polymerizable monomer represented by general formula, having a solubility parameter (SP value) of 8.9 to 10.5 (cal/cm 3) 0-5, as calculated by the method disclosed in the description, and satisfying the following formula: 1.00 < 100 × s + t + u / MB < 2.10 wherein s is an integer of 1 or more; t and u are each an integer of 0 or 1 or more; and MB is the molecular weight of the polymerizable monomer represented by general formula): (wherein R is a hydrogen atom or a methyl group; X, Y, and Z are each independently an alkylene group; s is an integer of 1 or more; t and u are each an integer of 0 or 1 or more; and W is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group.