To obtain a grip shape easy to grip by minimizing the reduction of a housing capacity due to a guide cylinder for mounting a handle to a bag main body and reducing the weight of the bag main body for using as a stick in common so as to make a grip part long even at a thin bag main body.

A bag is provided with free casters freely changing a moving direction at the four corners of the bag main body 4. In order to combine the handle 3, two guiding cylinders 5 are fixed by extending in a vertical direction on both sides of one side face 4B of the main body 4. At the handle 3, a grip 7 is fixed to the upper ends of two vertical rods 6. The grip 7 is stopped by a stopper at a vertically pulled out position. At the grip 7, the two rods 6 are combined by a combining part 7A and the grip part 7B extended nearly at the center of the main body 4 in a longitudinal direction which is vertical respect to the part 7A.