To provide a bag in which a zipper can be smoothly opened and shut by giving tension in a longitudinal direction of an opening at the time of opening and shutting.

A bag body 1 of a bag is formed of, for example, cloth having softness in a tube form, an opening is formed in a longitudinal direction of the upper side of the bag body 1 to fix a zipper 2, and the zipper 2 is opened and shut by a slider 6. One end of a strap 3 formed of webbing longer than the height of the bag body 1 or the like is fixed together by sewing a tube portion 1a and a side portion 1b to one side end in a longitudinal direction of the upper side of the bag body 1, and a stopper 4 is fixed to the other end of the strap 3. A pocket 5 is fixed to the lower side of the strap 3 fixing position of the bag body 1. A ring 9 in a D form to which hand strings 8 and 8 are fixed via a snap 10 is fixed to the side part of the bag body 1.