When crosstalk is cancelled without considering the contents of an image signal, the effect of the crosstalk cancellation is sometimes obtained effectively, and sometimes not. In order to solve this problem, an image signal processing unit which cancels crosstalk in a three-dimensional image signal includes image adaptation control units (601, 705) which determine a first coefficient based on a first image signal which is one of a left-eye image signal and a right-eye image signal of the inputted three-dimensional image signal, and a second image signal which is the other of the left-eye image signal and the right-eye image signal of the inputted three-dimensional image signal corresponding to the first image signal, and a corrected signal generation unit (711) which corrects the first image signal based on the first coefficient and the second image signal, and generates the corrected first image signal.