To provide a portable bag which keeps a user from twisting his bodies to reach out to the bag hung behind or excessively bending forward to reach out to the bags mounted under leg rests or a seat while it is favorably applicable even in the living environments other than the wheelchair.

With a device simply loaded or unloaded while it is firmly fixed utilizing spaces covering anywhere from an arm rest side to a leg rest side and a foot rest side, a side bag for the wheelchair is fixed on the wheelchair using an exclusively used L-shaped pipe or other shapes of pipes or plate-like members linked to the arm rests or the wheelchair. Sorts of exclusively used fastening tools which enable to hook the side bag as intact on the bed, desk, wall or the like are provided so as not to change the contents so frequently in the various living environments of the user as given off the wheelchair.