A solid-state image pickup device includes: a pixel array in which a plurality of pixels each outputting a photoelectric conversion signal are disposed; a reference voltage generator that generates a temperature detection voltage changing in accordance with a change in temperature and a reference voltage not depending on a change in temperature; a read circuit that performs signal processing of the photoelectric conversion signal output by the pixel array and the temperature detection voltage generated by the reference voltage generator and reads the photoelectric conversion signal and the temperature detection voltage that are processed; an output circuit that outputs both the photoelectric conversion signal and the temperature detection voltage for which the signal processing has been performed by the read circuit to the outside; and a bias generator that supplies a bias voltage generated based on the reference voltage to both the read circuit and the output circuit.