A solid-state imaging element comprising: first and second capacitive elements (321, 322); an upstream circuit configured to sequentially generate a reset level and a signal level corresponding to an exposure amount and cause each of the first and second capacitive elements (321, 322) to hold the reset level and the signal level; an upstream selection transistor configured to open and close a path between the upstream circuit and a predetermined upstream node; an upstream reset transistor configured to initialize a level of the upstream node; a selection circuit configured to sequentially perform control to connect one of the first and second capacitive elements (321, 322) to a predetermined downstream node, control to disconnect both the first and second capacitive elements (321, 322) from the downstream node, and control to connect another of the first and second capacitive elements (321, 322) to the downstream node; a downstream reset transistor configured to initialize a level of the downstream node when both the first and second capacitive elements (321, 322) are disconnected from the downstream node; and a downstream circuit configured to sequentially read the reset level and the signal level from the first and second capacitive elements (321, 322) via the downstream node and output the reset level and the signal level; wherein the first and second capacitive elements (321, 322) respectively have first ends connected in common to the upstream node and second ends connected to the selection circuit; and wherein the upstream circuit includes: a photoelectric conversion element; an upstream transfer transistor configured to transfer a charge from the photoelectric conversion element to a floating diffusion; a first reset transistor configured to initialize the floating diffusion; and an upstream amplification transistor configured to amplify a voltage of the floating diffusion and output the amplified voltage to the upstream node. first and second capacitive elements (321, 322); an upstream circuit configured to sequentially generate a reset level and a signal level corresponding to an exposure amount and cause each of the first and second capacitive elements (321, 322) to hold the reset level and the signal level; an upstream selection transistor configured to open and close a path between the upstream circuit and a predetermined upstream node; an upstream reset transistor configured to initialize a level of the upstream node; a selection circuit configured to sequentially perform control to connect one of the first and second capacitive elements (321, 322) to a predetermined downstream node, control to disconnect both the first and second capacitive elements (321, 322) from the downstream node, and control to connect another of the first and second capacitive elements (321, 322) to the downstream node; a downstream reset transistor configured to initialize a level of the downstream node when both the first and second capacitive elements (321, 322) are disconnected from the downstream node; and a downstream circuit configured to sequentially read the reset level and the signal level from the first and second capacitive elements (321, 322) via the downstream node and output the reset level and the signal level; wherein the first and second capacitive elements (321, 322) respectively have first ends connected in common to the upstream node and second ends connected to the selection circuit; and wherein the upstream circuit includes: a photoelectric conversion element; an upstream transfer transistor configured to transfer a charge from the photoelectric conversion element to a floating diffusion; a first reset transistor configured to initialize the floating diffusion; and an upstream amplification transistor configured to amplify a voltage of the floating diffusion and output the amplified voltage to the upstream node. a photoelectric conversion element; an upstream transfer transistor configured to transfer a charge from the photoelectric conversion element to a floating diffusion; a first reset transistor configured to initialize the floating diffusion; and an upstream amplification transistor configured to amplify a voltage of the floating diffusion and output the amplified voltage to the upstream node.