A photoelectric conversion unit in each of a plurality of pixels starts accumulation of charges at a first time and is controlled to be turned on after the first time and to be thereafter turned off at a second time to transfer the charges to a holding unit. A second transfer switch in at least one of the pixels is controlled to be turned on at a third time and a fourth time after the second time to transfer the charges held in the holding unit to an amplification unit, and a first transfer switch in the at least one of the pixels is maintained to be in an off state during a period from the third time to a fourth time.