An imaging device with a plurality of image sensing pixels and a plurality of event detection pixels is provided. Each image sensing pixel includes a photoelectric conversion element and an imaging signal generation readout circuit. The image sensing readout circuit can be shared by a plurality of photoelectric conversion elements. Each event detection pixel includes a photoelectric conversion element and an event detection readout circuit. The event detection readout circuit can be shared by a plurality of photoelectric conversion elements. In addition, the photoelectric conversion element of an event detection pixel can be selectively connected to a shared imaging signal generation readout circuit. The number of image sensing pixels is greater than the number of event detection pixels. In addition, the area of a photoelectric conversion element of an event detection pixel can be greater than the area of a photoelectric conversion element of an image sensing pixel.