PURPOSE: To obtain an expansion opening and closing device excellent in tenacious amenity having high air-tightness, clearness and controllability.

CONSTITUTION: Hang rollers providing freely vertical shafts 2 at the upper ends and center sections of longer wooden materials 4, 9 and 14 in a turnable manner are successively linked and fitted to an upper line 8, and the longer wooden materials 4, 9 and 14 are arranged in parallel. The first wooden material 4, second wooden material 9 and third wooden material 14 are pivoted on up and down two points 5, 5', 7, 7', 12, 12' and 17, 17' through flat bar tie materials in a turnable manner. In the case of locking, the flat bar tie materials are used for the woof of a shutter, and the is woven with warp of the wooden materials to form the whole strength and tensile force.