An imaging device comprising: a plurality of pixels including a first pixel and a second pixel ; a differential amplifier including a first amplification transistor , a second amplification transistor , a first load transistor and a second load transistor , wherein the first load transistor and the second load transistor constitutes a current mirror circuit and the first load transistor and the second load transistor being connected to a power source voltage (Vdd); 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 the second load transistor ; and a first reset transistor connected to the power source voltage (Vdd), a gate of the first reset transistor is connected to the first signal line , the drain and the gate of the first load transistor , and the gate of the second load transistor , wherein the first pixel includes a first photoelectric conversion element , a second reset transistor and the first amplification transistor , and the second pixel includes a second photoelectric conversion element , a third reset transistor and the second amplification transistor , the drain of the second reset transistor being connected to a reset voltage source(Vrst), the drain of the third reset transistor being connected to the second signal line , further comprising: a switch circuit coupled between the first reset transistor and the first signal line , wherein the switch circuit connects one of a source and a drain of the first reset transistor to the first signal line during a reset operation of the first and second pixels such that the first signal line carries a larger current than the second signal line , the imaging device being configured to turn on the second reset transistor and the third reset transistor during the reset operation. a plurality of pixels including a first pixel and a second pixel ; a differential amplifier including a first amplification transistor , a second amplification transistor , a first load transistor and a second load transistor , wherein the first load transistor and the second load transistor constitutes a current mirror circuit and the first load transistor and the second load transistor being connected to a power source voltage (Vdd); 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 the second load transistor ; and a first reset transistor connected to the power source voltage (Vdd), a gate of the first reset transistor is connected to the first signal line , the drain and the gate of the first load transistor , and the gate of the second load transistor , wherein the first pixel includes a first photoelectric conversion element , a second reset transistor and the first amplification transistor , and the second pixel includes a second photoelectric conversion element , a third reset transistor and the second amplification transistor , the drain of the second reset transistor being connected to a reset voltage source(Vrst), the drain of the third reset transistor being connected to the second signal line , further comprising: a switch circuit coupled between the first reset transistor and the first signal line , wherein the switch circuit connects one of a source and a drain of the first reset transistor to the first signal line during a reset operation of the first and second pixels such that the first signal line carries a larger current than the second signal line , the imaging device being configured to turn on the second reset transistor and the third reset transistor during the reset operation. <EOS>