According to one embodiment, a solid-state imaging device includes a semiconductor substrate including a pixel area and a peripheral circuit area, an interconnection structure provided on a first principal surface of the semiconductor substrate and including first interconnection layers electrically connected to the peripheral circuit area, a second interconnection layer provided in the peripheral circuit area and on a second principal surface of the semiconductor substrate, a third interconnection layer provided above the second interconnection layer with an insulating layer therebetween, and through electrodes electrically connecting the second interconnection layer to the third interconnection layer.