To provide a convenient and handy micromini oxygen-mask-cum-gas-mask constantly carried as emergency and first-aid goods.

The arrival time of an ambulance is reported to delay year after year, on average, taking 6 minutes or more to get there, so that it is desired, in emergency, to provide a light and handy micromini oxygen and gas mask which is expected as a protective gear from toxic gas and an effective means of protecting own life under the worst situation by arresting the initial-stage cerebral hypoxia to the minimum. This mask is a micromini type and has a limit in its volume so that, if necessary, two or three micromini oxygen generators can be carried to elongate the generation hours.