Oxygen mask

The utility model discloses an oxygen mask which comprises an oxygen mask body and an air bag, and the air bag is arranged on the side edge of the oxygen mask body in a surrounding mode. The first connecting port is formed in the right side of the air bag, a second connecting port is formed in the top of the air bag, the first connecting port is connected with an external inflator pump, and the second connecting port is connected with an external oxygen catheter; an opening block is fixed in the first connecting port, a fixing rod is slidably arranged in the opening block, and open holes are formed in the opening block at equal intervals. The oxygen mask is provided with a first check block, an external air pump extrudes an ejector rod to move, then air enters the air bag through an opening block, the first check block can be attached through extrusion of the air in the air bag and a spring, and therefore leakage of the air in the air bag is avoided; therefore, the air bag can be filled with air all the time,