To provide a control unit for a hybrid vehicle capable of acquiring stable driving force in a low-speed range.

The control unit of a hybrid vehicle is provided with an electricity accumulating status detecting means for detecting an electricity accumulating conditions of an electricity-accumulating means, and mode change means for changing a continuously variable speed change ratio mode where a motor generator goes to a charged state, in spite of the running mode selected by a control means, when it is decided that the amount of electricity accumulation based on the electricity accumulating status detecting means is lower than the prescribed value.