An imaging device includes a plurality of pixels including a first pixel and a second pixel, and a differential amplifier including a first amplification transistor, a second amplification transistor, and a first load transistor. The first load transistor receives a power source voltage. The imaging device includes a first signal line coupled to the first amplification transistor and the first load transistor, a second signal line coupled to the second amplification transistor, and a first reset transistor configured to receive the power source voltage. A gate of the first reset transistor is coupled to the first load transistor. The first pixel includes a first photoelectric conversion element and the first amplification transistor, and the second pixel includes a second photoelectric conversion element and the second amplification transistor.