An imaging element includes: a processing circuit that performs analog/digital conversion on captured image data; a memory that is capable of storing the captured image data obtained as a result of performing the analog/digital conversion by the processing circuit; and an output circuit that outputs output image data based on the captured image data to an exterior of the imaging element, wherein the output circuit includes a first output line and a second output line, the first output line is connected to a first signal processing circuit disposed at the exterior, the second output line is connected to a second signal processing circuit disposed at the exterior, and at least one of an output frame rate or an output data amount of the output image data is different between the first output line and the second output line.