A control system for a hybrid vehicle wherein a plurality of prime movers and wheels are connected in a power transmittable manner, comprising: a decider for deciding a power loss of a case in which a power of predetermined prime mover, which is one of a plurality of the prime movers is transmitted to a rotary member including another prime mover; and a controller for controlling a rotating state of the rotary member including said another prime mover on the basis of a decision result of the decider.