When a horizontal skipping operation is performed in a solid-state imaging apparatus that includes an A/D converting circuit in each column and that applies an arithmetic operation process to a digitalized signal and an arithmetic operation is performed with signals held by a plurality of register circuits, A/D converters and register circuits in columns in which signals are skipped, or not read out, are not involved in the operations. A more consideration is needed in terms of the use efficiency of circuits. A unit for connecting a register circuit of a certain column and a register circuit of a different column is arranged.