An image processing device includes: a motion vector measurement region setting unit for setting a plurality of motion vector measurement regions; a motion vector calculation unit for calculating motion vectors; a motion vector reliability calculation unit for calculating a reliability of the respective motion vectors; a main region setting unit for setting a main region; and a motion vector integration processing unit for calculating an inter-image correction vector by integrating the motion vectors of the plurality of motion vector measurement regions, taking into account the reliability. The motion vector integration processing unit includes a contribution calculation unit for calculating a contribution of the respective motion vectors from a positional relationship between the respective motion vector measurement regions and the main region, and integrates the motion vectors in accordance with the reliability and the contribution.