1. An image evaluation apparatus comprising: a storage portion which stores a plurality of images when a photographing area of a camera has continuously imaged in a predetermined time interval a plurality of frames of a subject, and an image evaluation portion which evaluates a plurality of the images stored in the storage portion, based on a characteristic amount showing a state in which the subject is changing in chronological sequence, wherein: the image evaluation portion, from a plurality of the images stored in the storage portion, calculates a number of peak frequencies which form a frequency distribution of motion vector arising between frames of each segmented region when each image is segmented into a plurality of segmented regions, and which have a frequency equal to or greater than a threshold frequency, and carries out the evaluation based on the number of the peak frequencies, and the image evaluation portion gives a relatively higher evaluation with respect to other images, for an evaluation of an image imaged within a predetermined time from the change of the number of the peak frequencies.