An imaging device includes: a pulse-signal superimposing circuit configured to superimpose a first pulse signal generated by a pulse-signal generator on a voltage； a separating circuit that is disposed between a light receiver and a transmission cable, the separating circuit being configured to separate an offset voltage and a pulse voltage from the voltage transmitted through the transmission cable and output the offset voltage to the light receiver； a pulse-signal detector configured to detect the first pulse signal superimposed on the transmission cable； a pulse-signal converting circuit configured to convert a frequency of the first pulse signal detected by the pulse-signal detector into a frequency of a second pulse signal used to generate a synchronization signal for driving the light receiver； and a timing generator configured to generate the synchronization signal based on the second pulse signal obtained after conversion by the pulse-signal converting circuit.
