An endoscope includes: an imager； a transmission path configured to connect a controller and the imager with each other； a superimposed signal generating circuit configured to generate, as a superimposed signal, a signal obtained by associating High and Low of a pulsed data signal with a change in a pulse width of a pulsed reference clock signal； a parallel-serial converter circuit configured to perform parallel-serial conversion on the imaging signal； a PLL circuit configured to generate a multiplied clock signal； a restoring circuit configured to restore, based on the superimposed signal and the multiplied clock signal, the reference clock signal and the data signal contained in the superimposed signal； and a timing generating circuit configured to generate, based on the reference clock signal and the data signal, a drive signal for driving the imager.
