A solid-state imaging device capable of simplifying a pixel structure to reduce a pixel size and capable of suppressing a variation in characteristics between pixels when a plurality of output systems are provided. A unit cell includes two pixels having upper and lower photoelectric converters, transfer transistors connected to the upper and lower photoelectric converters, a reset transistor, and an amplifying transistor. A full-face signal line is connected to the respective drains of the reset transistor and the amplifying transistor. Controlling the full-face signal line along with transfer signal lines and a reset signal line to read out signals simplifies wiring in the pixel and permits reduction of the pixel size.