To provide a hinge which reduces the number of mounting places by screws, etc. and improves mounting workability.

A hinge body 3 to be mounted on a box body has a supporting shaft 4 provided to be movable in a vertical direction. The supporting shaft 4 has an L-shaped bent part 4a at its lower end and a spring 6 urging the supporting shaft 4 upward. In the state that the supporting shaft 4 is lowered, the bent part 4a is engageable with an engaging recess part 5 formed at a lower end of the hinge body 3. In the state that the bent part 4a of the supporting shaft 4 is engageable/disengageable to/from the engaging recess part 5, the supporting shaft 4 is urged and raised upward by the spring 6 so that the supporting shaft 4 may substantially project upward from the hinge body 3.