To provide a pull box in which the working is simple, few injuries are incurred, and no wiring can be damaged.

An opening end of a case 2 of a pull box is bent inwardly at right angles to form a locking part 9. Corrugated leaf springs 10a, 10b, 10c, 10d are fitted to each side on a back side of a lid 3 to be fitted to the case 2, and the locking part 9 of the case 2 is held by the back side of the lid 3 to prevent the locking part 9 of the case 2 from being projected in the case to prevent injuries or damages on the wiring, and locking can be performed only by fitting the leaf springs 10a, 10b, 10c, 10d to the lid 3 to hold the lid 3 with the simple work.