A solid-state image pickup device comprising: a pixel including a photoelectric conversion element; an amplifying circuit configured to amplify a signal of the pixel and to have a variable amplification factor; and a storage capacitor (Ctn, Cts), connected to an output node of the amplifying circuit via a first switch (12, 13), configured to store the amplified signal of the pixel, characterized by a band limitation unit configured to control the bandwidth of the amplifying circuit, comprising: a load element (Cl1, Cl2) connected to the output node of the amplifying circuit via a plurality of second switches (16, 17), wherein the load element (Cl1, Cl2) comprises a plurality of load capacitors, having a load capacitor having a first capacitance value and a load capacitor having a capacitance value smaller than the first capacitance value, wherein the output node of the amplifying circuit is connected to the plurality of load capacitors via the plurality of second switches, wherein the band limitation unit is configured to switch the plurality of second switches (16, 17) between an on state and an off state, wherein the plurality of second switches are in the on state during a period in which the amplifying circuit is reset, wherein the plurality of second switches are configured to switch between on and off in accordance with the amplification factor of the amplifying circuit during the period in which the first switch is in an on state, such that the load capacitor having the first capacitance value is connected to the output node of the amplifying circuit when the amplifying circuit operates with a first gain, and the load capacitor having the capacitance value smaller than the first capacitance value is connected to the output node of the amplifying circuit when the amplifying circuit operates with a second gain, which is higher than the first gain. a pixel including a photoelectric conversion element; an amplifying circuit configured to amplify a signal of the pixel and to have a variable amplification factor; and a storage capacitor (Ctn, Cts), connected to an output node of the amplifying circuit via a first switch (12, 13), configured to store the amplified signal of the pixel, characterized by a band limitation unit configured to control the bandwidth of the amplifying circuit, comprising: a load element (Cl1, Cl2) connected to the output node of the amplifying circuit via a plurality of second switches (16, 17), wherein the load element (Cl1, Cl2) comprises a plurality of load capacitors, having a load capacitor having a first capacitance value and a load capacitor having a capacitance value smaller than the first capacitance value, wherein the output node of the amplifying circuit is connected to the plurality of load capacitors via the plurality of second switches, a load element (Cl1, Cl2) connected to the output node of the amplifying circuit via a plurality of second switches (16, 17), wherein the load element (Cl1, Cl2) comprises a plurality of load capacitors, having a load capacitor having a first capacitance value and a load capacitor having a capacitance value smaller than the first capacitance value, wherein the output node of the amplifying circuit is connected to the plurality of load capacitors via the plurality of second switches, wherein the band limitation unit is configured to switch the plurality of second switches (16, 17) between an on state and an off state, wherein the plurality of second switches are in the on state during a period in which the amplifying circuit is reset, wherein the plurality of second switches are configured to switch between on and off in accordance with the amplification factor of the amplifying circuit during the period in which the first switch is in an on state, such that the load capacitor having the first capacitance value is connected to the output node of the amplifying circuit when the amplifying circuit operates with a first gain, and the load capacitor having the capacitance value smaller than the first capacitance value is connected to the output node of the amplifying circuit when the amplifying circuit operates with a second gain, which is higher than the first gain.