Motion detection imaging device

A motion detection imaging device comprises an imaging element and an optical lens system for collecting light entering in a capture range to form images on the imaging element. The optical lens system comprises: an optical lens array having center lenses for collecting light in a front capture range and left/right side lenses for collecting lights in side capture ranges; and prisms for guiding lights in the side capture ranges to the side lenses. The imaging device further comprises: a timing generator for allowing images formed by the lenses to be imaged with a time difference between in-row images; and a microprocessor for reproducing wide angle images from the in-row images by one operation of a shutter to detect movement of a target based on difference between the wide angle images. The imaging device with simple structure can monitor, with high probability, a target moving fast in a wide range.