CONTROL DEVICE FOR HYBRID VEHICLE

To reduce the size of the auxiliary battery while ensuring vehicle startup and the durability of an auxiliary battery. A starter motor (1), a transverse engine (2), a motor/generator (4), a high power battery (21), and a 12V battery (22) that is charged through a DC/DC converter (37) by the high power battery (21) are provided. This FF hybrid vehicle comprises a hybrid control module (81) that controls the operation start timing of the DC/DC converter (37) at vehicle startup. When an ignition switch (91) is pressed, after connecting a high power relay (21 a) that is interposed between the motor/generator (4) and the high power battery (21), the hybrid control module (81) starts operation of the DC/DC converter (37) when the outputtable electric power by the high power battery is a prescribed value or greater.