A solid-state imaging apparatus in which a first substrate, a second substrate electrically connected to the first substrate through a connector and circuit elements disposed in the first substrate and in the second substrate, and forming pixels, each of the pixels includes a photoelectric conversion element disposed in the first substrate and configured to generate a signal corresponding to an amount of incident light, and a signal holder disposed in the second substrate in correspondence with the photoelectric conversion element and configured to hold an output signal corresponding to the signal generated by the corresponding photoelectric conversion element, and the signal holder is formed by laminating a capacitance element including a plurality of electrodes on a plurality of layers within the second substrate.