The present invention provides a polarizing film having a high dichroic ratio. The polarizing film contains a disazo compound represented by the following general formula (1). In the general formula (1), Q1 represents a phenyl group having at least one —SO3M group; Q2 represents a naphthylene group having at least one —SO3M group; X represents an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a thioalkyl group having 1 to 4 carbon atoms, a halogeno group, or a polar group; subscript k denotes the number of substitutions of X and represents an integer of 0 to 5; and M represents a counter ion, where when k is an integer of 2 or more, Xs are the same or different.