Abstract: A receiving circuit includes an impedance compensating circuit, a first input terminal and a second input terminal coupled to a first signal line and a second signal line, a first signal and a second signal corresponding to differential signals being transmitted at the first input terminal and the second input terminal, respectively, a signal input circuit, coupled to the first input terminal and the second input terminal, which receives the first signal and the second signal are input, and a differential-signal detector that detects whether or not the differential signals are supplied to the first input terminal and the second input terminal.