1. A reproducer for performing slide show reproduction in which a plurality of images is continuously reproduced, comprising: a storage part which stores the images; a vibration detection part which detects a vibration operation of the reproducer by a user; a switching instruction part which instructs switching of reproduction content in the slide show reproduction based on a detection result from the vibration detection part; a synthesis processing part which performs creation processing of slide show images, which are images for the slide show reproduction, based on instructions of the switching instruction part; and a slide show control part which performs the slide show reproduction of the images stored in the storage part and the slide show images.