To effectively prevent a suspending conveyor device from which hangers are suspended from being swing in the lateral direction.

This suspending conveyor device comprises a swing stopping guide rail for stopping the lateral swing of the hangers suspended from a conveying traveling body movably supported on a traveling guide rail. The swing stopping guide rail 50 is installed on only one of the left and right sides of the traveling guide rail. A pair of upper and lower rollers 31a, 31b so attached to the hanger as to sandwich the swing stopping guide rail 50 from both upper and lower sides are supported on the hanger movably in the vertical direction within a specified range. A spring means 32 for biasing and holding the rollers is attached at a specified position in that movable range. A damper 33 is installed to damp the vertical movement of the rollers 31a, 31b relative to the hanger 6.