1. A moving image generating apparatus, comprising: an image storing section that stores a plurality of captured images continuously taken in a predetermined exposure time; a movement computing section that computes a movement of a subject between a timing at which one captured image is taken and a timing at which a next captured image taken next to the one captured image is taken, based on a change of a position of the subject in the plurality of captured images; a frame image generating section that performs an image processing on the plurality of captured images to generate a frame of moving image from the one captured image, in order that a blurring amount of an areal image of the subject included in the one captured image is larger than a blurring amount of other areal images, according to the movement of the subject computed from said movement computing section; and a moving image recording section that records, as a moving image, a plurality of frame images each generated from said frame image generating section in association with each of the plurality of captured images.