First processing of causing a hold unit to hold a first signal from an amplification unit based on reset of the amplification unit, second processing of performing AD conversion of the held first signal and outputting a second signal obtained by superposing a signal based on charges generated in a photoelectric conversion unit of a first-row pixel on the first signal, third processing of performing an operation of performing AD conversion of the held second signal and an operation of resetting the amplification unit at least partly in parallel, and fourth processing of causing the hold unit to hold a fourth signal obtained by superposing a signal based on charges generated in the photoelectric conversion unit of a second-row pixel on a third signal from the amplification unit based on resetting of the amplification unit and is output from the amplification unit are performed.