To provide a screen device capable of preventing damage of a screen member due to shock to the utmost, facilitate replacement and maintenance of the screen member, and simplify a driving mechanism.

In this screen device closing at least a part of an opening part 2 by the flexible screen member 7 whose upper end is fixed to an upper end of the opening part 2, belt-like magnets (flexible attraction means) 11 are provided in both left and right end parts of the screen member 7, both left and right end parts of the screen member 7 are detachably attracted onto a rail 3 erected on the left and right sides of the opening part 2 by the belt-like magnets 11, and a belt (a belt-like or linear flexible member) 16 attached to the screen member 7 is wound up to open the opening part 2.