In a semiconductor device, a first package is provided with a first substrate under which a semiconductor chip configured to output a signal and a first wiring electrically connected to the semiconductor chip are arranged. A second package is provided with a second substrate above which a processing circuit configured to process the output signal, a second wiring electrically connected to the processing circuit, and an encapsulant configured to seal the processing circuit are arranged, the semiconductor chip and the encapsulant being arranged to face each other in a non-contact manner. A connection portion electrically connects the first wiring and the second wiring.