[Object] To make the both images easy to be compared in the case where a plurality of series of images are arranged alongside and displayed. [Solution] An information processing device according to the present disclosure includes: a motion information acquiring section that acquires a plurality of pieces of motion information showing a series of motions of a same kind performed by a plurality of users; a reference timing extracting section that extracts a reference timing on the basis of a plurality of pieces of the motion information; an image information acquiring section that acquires a plurality of series of image information corresponding to a plurality of pieces of the motion information; and a synchronization processing section that synchronizes a plurality of pieces of the image information on the basis of the reference timing.