A backside-illumination solid-state image pickup apparatus and a backside-illumination solid-state image-pickup-apparatus manufacturing method, an image pickup apparatus, and electronic equipment that are configured to make it possible to reduce manufacturing costs. A diced memory circuit and logic circuit are laid out in a horizontal direction, are embedded and flattened by using an oxide film, and are stacked so as to be enclosed in a plane direction under a solid-state image pickup element. The present disclosure can be applied to an image pickup apparatus.