To provide a suspension device causing no falling-in of a sash pulley by smoothly transferring to rolling balls from wheels when the sash pulley having the wheels and the rolling balls passes through a crossing part of hanger rails.

A suspension device 1 is composed of hanger rails 2 and a sash pulley 3. The hanger rails 2 are laid on the ceiling by crossing two pieces. The sash pulley 3 travels along the hanger rails 2 by rolling wheels 5 on a side surface of a body 4 to suspend a partition panel by a suspension bolt 6 suspended from the center. The body 4 has respectively the wheels 5 by two pieces on four orthogonal side surfaces, and rolling balls 7 respectively juxtaposed at equal intervals by three pieces along the respective side surfaces are provided on the under surface side of the body 4. Rolling ball traveling surfaces 10 of the hanger rails 2 are positioned below these along wheel traveling surfaces 9 in a prescribed range of a crossing part, and extend to the expanding slot side 8. The rolling balls 7 are arranged below the wheels 5 on the under surface side of the body 4. Instead of the wheels 5 positioned on the expanding slot 8, the rolling balls 7 make the sash pulley 4 smoothly travel in the crossing part of the hanger rails 2.