To simplify entire structure and to attain improvement in workability and cost down by decreasing the number of parts by unnecessitating a glass door lock device.

Lock parts 9 and 9 or the like are respectively provided on the opening side inner side face of an outer frame and the opening side rear surface of a glass door frame 3, and plural projections for attachment having head parts 14 are provided on the opening side rear surface of a front frame 2. On the other hand, a front frame lock pole 12 having hooks 16 and 16 for locking the front frame 2 while being engaged with the lock parts of the outer frame and a glass door frame lock pole 13 having hooks 18 and 18 for locking the glass door frame 3 while being engaged with the lock parts of the glass door frame 3 are respectively provided with plural key-shaped holes 17a-17c and 19a-19b. Further, by loosely fitting the key-shaped holes 17a-17c and 19a-19b to the projections 11a-11c for attachment, the front frame lock pole 12 and the glass door frame lock pole 13 can be attached to the projections 11a-11c for attachment so as to be vertically moved.