In a semiconductor device, a first receiving section and a first transmitting section are configured to through-output data for a first device included in reception data from a second output terminal when bridge selection data included in the reception data indicates an on state of a through-output in which bit data is output as is; a second transmitting section keeps a signal level of a first output terminal so that a signal of a first bus, which a first transmitting/receiving device uses to receive the reception data from a transmitting device, becomes recessive when the through-output is being performed.