To provide a storage for cooling avoiding loosening of an indoor lamp.

Since tab terminals 2C and 2D connecting lead wires 10 and 11 are provided in the indoor lamp 2 and electric wiring is connected by the terminals, probability of loosening, coming off, or falling off of a connection terminal 12 by vibration can be minimized. An indoor lamp socket 3 is formed by a synthetic resin material, one and another of half bodies 3A and 3B bisecting a hollow cylinder body are formed so they can be opened and closed, and an attaching part is formed for attachment in the storage and holding the indoor lamp 2 when the half bodies 3A and 3B are closed and a latch is locked in a state housing the indoor lamp 2.