To provide a hinge of an equipment storing box dispensing with replacement of special jig and parts in attaching and detaching a door member, and capable of easily attaching and detaching the door member without completely removing a hinge pin not to lose the hinge pin.

The hinge pin 9 is penetrated between a first box main body hinge 11 and a second box main body hinge 12 provided on a drip part 7 of a box main body 2 through a coil spring member 10, an E-ring 13 is locked on the hinge pin 9 between the spring member 10 and the second box main body hinge 12 to stop the hinge pin 9, and the hinge pin 9 is energized in the inserting direction by the spring member 10. A first cutout part 15 and a second cutout part 16 are formed in the drip part 7, whereby when the hinge pin 9 is penetrated in a hinge pin penetrating hole 6a of the door side hinge 6 provided on the back of the door member 4 to fit the door member 4 to the box main body 2, a bent part 9a of the hinge pin 9 is locked in the first cutout part 15, and when the hinge pin 9 is pulled out of the hinge pin penetrating hole 6a of the door side hinge 6, the bent part 9a of the hinge pin 9 is locked in the second cutout part 16.