This invention relates to a gas mask used for refuge in a fire, for example. The gas mask comprises a cylindrical mask body of fire-proof soft rubber material detachably connected to goggles of transparent or semitransparent fire-proof material. A cartridge is detachably inserted into and secured to the cylindrical mask body and comprises filter layers and a pack of catalyst which is a composite of copper oxide and manganic oxide and a drying agent laminated on the catalyst.
