PURPOSE: To improve workability and appearance by integratedly providing a blind frame outside a window frame, and arranging a slat driving shaft for the blind on the upper part of the window frame.

CONSTITUTION: A blind frame 2 is joined or integratedly fitted on the outdoor side of a frame 1 with a glass window fitted therein. Next, a driving shaft 3 to open/close and elevatably move slats 4, and the driving motor are received in the upper frame 9 of the frame 1. Next, a cover for maintenance and inspection is provided on the indoor side of this receiving part, and electric power is taken out from the plug socket in a room. Hereby, manufacturing cost and fitting work cost can be reduced, execution, maintenance, and inspection can be safely performed, and the upper frame of the blind can be miniaturized so as to improve appearance.