1. A motion detection imaging device comprising: a solid-state imaging element with unit pixels arranged in a matrix of rows and columns; and an optical lens system for collecting lights entering in a capture range so as to form, on the solid-state imaging element, images which are imaged with a time difference so as to detect movement of a target object in the images based on a difference between the imaged images, the optical lens system comprising: an optical lens array having multiple optical lenses (hereafter referred to as “center lenses”) which are arranged in the direction of the columns of the unit pixels, and into which a light in a predetermined front range in the capture range enters, and also having two sets of multiple optical lenses (hereafter referred to as “left and right side lenses”) which are arranged left and right of the center lenses and in the direction of the columns of the unit pixels, and into which lights in predetermined left and right ranges in the capture range enter; and light bending means placed on entrance side of the left and right side lenses for bending and guiding lights entering in the predetermined left and right ranges in the capture range to the left and right side lenses, respectively, directing the lights along optical axes of the left and right side lenses, the solid-state imaging element having image areas for respectively imaging multiple images (hereafter referred to as “single-eye images”) formed by the center lenses and the left and right side lenses (such image areas being hereafter referred to as “single-eye image areas”), wherein the motion detection imaging device further comprises: rolling shutter means for allowing the solid-state imaging element to image the single-eye images with a time difference between the single-eye images in the single-eye image areas (hereafter referred to as “in-row single-eye image areas”) in adjacent rows of the in-row single-eye image areas, the rows extending in the same direction as the rows of the unit pixels; image combining means for combining, in each of the in-row single-eye image areas, the single-eye images formed by the center lenses from the light entering in the predetermined front range in the capture range with the single-eye images formed by the left and right side lenses from the lights entering in the predetermined left and right ranges in the capture range so as to reproduce a wide angle image, thereby reproducing multiple wide angle images with a time difference between the in-row single-eye image areas; and motion detection means for detecting the target object in the wide angle images based on a difference between the wide angle images reproduced by the image combining means from the single-eye images in the in-row single-eye image areas, respectively.