A solid-state imaging apparatus comprises a plurality of pixel units forming a pixel array, and a plurality of processing portions each corresponding to each column of the pixel array respectively, and each of the plurality of processing portions comprising a first front-side capacitor configured to hold a first signal having a noise component, a second front-side capacitor configured to hold a second signal having the noise component and a signal component, a first transfer portion configured to transfer the first signal from the first front-side capacitor to a first back-side capacitor, and a second transfer portion configured to transfer the second signal from the second front-side capacitor to a second back-side capacitor, wherein positions of the first and the second transfer portions are different from each other in a direction of the column.