IDLING STOP CONTROL UNIT AND IDLING STOP METHOD

An idling stop control unit (ISCU) provided in a vehicle including an air conditioner (S) which controls an air conditioning state of a passenger compartment of the vehicle. The idling stop control unit includes: idling stop prohibiting means for canceling idling stop to restart an engine (10) and prohibiting execution of idling stop when a switch for changing the air conditioning state is operated during idling stop in which the engine (10) is stopped when the vehicle is at a stop; and idling stop enabling means for automatically lifting the prohibition and enabling execution of idling stop when a predetermined condition is met.