A solid-state imaging device according to an embodiment includes a first charge detector, a first output circuit and a pulse generator. The first charge detector includes a plurality of first pixels and is configured to detect charges accumulated in the plurality of first pixels. The first output circuit is configured to amplify the charges detected by the first charge detector and output the charges as an output signal. The pulse generator is configured to generate a sampling pulse to extract a charge signal from the output signal during a period different from a signal output period in which the output signal is outputted.