PURPOSE: To perform cargo handling by a crane from both right/left sides of a vehicle without worsening rigidity of a strut and a wing in a cargo chamber and without increasing weight of a car body by swivelably supporting a swivel bracket to a body side, and swiveling the wing relating to the swivel bracket by a cylinder device.

CONSTITUTION: A driving gear 22 is constituted of a swivel bracket 24 swivelably supported to a body side in longitudinal end central positions of wings 20A, 20B further to rotatably support the wings 20A, 20B in the vicinity of the body side, first cylinder device 26 for driving the swivel bracket 24 and the second cylinder device 28 for driving the wings 20A, 20B relating to the swivel bracket 24. The wings 20A, 20B are opened to a side surface opened condition by the first cylinder device 26 and driven to a roof opened position by the second cylinder device 28. When the wing driving gear is provided respectively in the right/left wings, cargo handling by a crane from a ceiling can be performed from both right/left sides.