To increase freedom of design with simple constitution, reduce the burden of a motor and reduce a failure caused by the slight torsion or the like of an arm.

A shade device is provided with a pull-out member 2 fixed to the end of a shade 1 energized in a wound direction to a winding part M, at least two arms with the respective one ends rotatably journalled to the pull- out member 2, and filament members 6 provided in opposed positions away from an installation part of the winding part M so as to be movable in normal and reverse directions, with the other ends of the arms 3 rotatably journalled to the parts moving mutually in opposite directions. The filament members 6 are driven in the normal and reverse directions by a motor 8.