To provide a movable wall device which can be simply configured and to which a wall panel can be easily fixed as required.

A hanging bolt 4 is fixed to a wall panel 5 at the lower part thereof in a vertical direction, and is relatively and vertically movable with respect to a suspension wheel 3 at an upper part thereof and prevented from downward slipping out. A top edge of the hanging bolt 4 can come into and away from contact with a top surface of a hanger rail 2. When the panel 5 moves, a gap G is formed between the top edge of the hanging bolt 4 and the top surface of a hanger rail 2. A push-up leg 18 for pushing up the wall panel 5 integrally with the hanging bolt 4 on a floor F is provided in a lower part of the wall panel 5. When the wall panel 5 is pushed up by the push-up leg 18, the top edge of the hanging bolt 4 abuts on the top surface of the hanger rail 2 to fix the wall panel 5 between the hanger rail 2 and the floor F.