Abstract: A movable telephone adapter for connecting an exchange line to a telephone set, including two receptacle supports fastened in a base for holding a telephone receptacle in an opening on an upper cover which is attached to the base. The base has two retaining plates corresponding to the two retainers on the upper cover for quickly mounting the upper cover to the base. By engaging the projecting edges of the telephone receptacle in the holes on the receptacle supports, the telephone receptacle can be rotated on the receptacle supports. By engaging the cross-shaped, raised portions of the telephone receptacle in the cross-shaped grooves on the receptacle supports, the telephone receptacle may be alternatively positioned at either a horizontal or a vertical position relative to the receptacle supports.