An imaging device having pixels in a row which include: first pixel including a first photoelectric converter and a first transistor having a first control terminal; second pixel including a second photoelectric converter and a second transistor having a second control terminal; third pixel including a third photoelectric converter and a third transistor having a third control terminal; and fourth pixel including a fourth photoelectric converter and a fourth transistor having a fourth control terminal. The device further including input signal line, a signal for controlling the first to fourth transistors input to the signal line; first buffer circuit having a first input terminal coupled to the signal line, and a first output terminal coupled to the first and second control terminals; and second buffer circuit having a second input terminal coupled to the signal line and a second output terminal coupled to the second and third control terminals.