A solid-state imaging device includes: a pixel array unit in which there are arrayed in a matrix form a plurality of pixels including a plurality of normal pixels which are pixels for video output, and a plurality of phase difference pixels which are pixels for focal-point detection; an A/D conversion unit configured to compare pixel signals output from the pixels of the pixel array unit with a ramp signal serving as a reference signal, thereby performing A/D conversion on the pixel signals; and a control unit configured to perform control so that the ramp signal to be compared with the phase difference pixels has a different slope from that of the ramp signal to be compared with at least a part of the normal pixels.