Provided is a photosensor including a light receiving part generating electric charge according to incident light, a charge transfer gate configured to transfer the electric charge generated in the light receiving part, and a signal generation unit configured to generate a charge transfer signal applied to the charge transfer gate, in which the signal generation unit generates the charge transfer signal so that the charge transfer gate is brought into a charge transfer state in a first time range of a first period belonging to an n-th (n is an integer of 1 or more) frame and the charge transfer gate is brought into a charge transfer state in a second time range of a second period belonging to an m-th (m is an integer of 1 or more different from n) frame.