A solid-state imaging device includes a plurality of pixels disposed in a two-dimensional array, a scanning circuit that selects a specific pixel among the pixels by selecting a pixel row and a pixel column and a signal output circuit that outputs a signal from the pixel selected by the scanning circuit. The plurality of pixels include a plurality of first focus detection pixels and a plurality of second focus detection pixels. The first focus detection pixels and the second focus detection pixels are disposed within a single row or a single column. The scanning circuit selects a plurality of first or second focus detection pixels disposed within the single row or column at once. The signal output circuit combines signals from the plurality of first or second focus detection pixels selected by the scanning circuit and outputs a resulting composite signal.