The invention provides a medicament container which is arranged on a device and can generate chlorine dioxide gas with stable concentration, and a gas feeding device which can generate the chlorine dioxide gas with the stable concentration. The medicament container (1) is provided with: a semitransparent container body (2) for storing a stabilization chlorine dioxide water solution (3) which irradiates ultraviolet radiation and generates the chlorine dioxide gas a slab-shaped separator (4) which can be removably arranged on inner wall of the container body (2) and at the same time is positioned above the stabilization chlorine dioxide water solution (3) stored in the container body (2) a slab-shaped liquid maintaining paper (5) which is arranged on the separator (4) and is formed by non-woven fabrics maintaining the stabilization chlorine dioxide water solution (3) a liquid absorption paper (6) which absorbs the stabilization chlorine dioxide water solution (3) and maintains stabilization chlorine dioxide water solution (3) on the liquid maintaining paper (5) and a slab-shaped gasification pad (7) which is formed by inorganic matter fiber arranged on the liquid maintaining paper (5).
