In the present invention, when an automatic transmission has a characteristic wherein the belt winding diameter at a primary pulley (41) is greater than the belt winding diameter at a secondary pulley(42) when the primary pressure and the secondary pressure are the same, and a first electromagnetic actuator (SLPs) and a second electromagnetic actuator (SLSs) are unable to operate, a failsafe valve (124) changes the position of a fist valve body (123p1) of a primary pressure control valve (123P) such that the primary pressure decreases.