In a solid-state imaging device including a plurality of pixels each pixel including a plurality of photodiodes, it is prevented that an incidence angle of incident light on the solid-state imaging device becomes large in a pixel in an end of the solid-state imaging device, causing a difference in output between the two photodiodes in the pixel, and thus autofocus detection accuracy is deteriorated. Photodiodes extending in a longitudinal direction of a pixel allay section are provided in each pixel. The photodiodes in the pixel are arranged in a direction orthogonal to the longitudinal direction of the pixel allay section.