To eliminate a back angle, etc., for mounting, improve appearance and reduce cost in an elevator landing where a header case is mounted on a landing entrance top, by mounting the header case whose both sides are formed with an extension bracket respectively on building side columns by a landing entrance.

At the time of mounting a header case 1 which stores the landing device of an elevator landing, the header case 1 whose both sides are formed with an extension bracket 4 respectively is fixed on building side columns 5 on the right and left of a landing entrance. Or, the header case 1 where a mounting bracket 6 which crosses both right and left ends is mounted is hanging-fixed through the mounting bracket 6 onto a hanging bracket 8 mounted on a jamb mounting angle 7. It is thus possible to eliminate a conventional back angle, back angle mounting angle or the like attached separately to mount the header case 1, improve appearance in design and reduce building cost.