A respirator mask fixing structure includes a cover fixing piece and a band-shaped head cover. The mask fixing piece has a socket for receiving the respirator mask, and a plurality of joints; the belt head cover has a plurality of straps surrounding a space for the patient's head to fit and extends from the strap A plurality of connecting strips are connected to the joint portion in a one-to-one manner, and the strap and the connecting belt constitute an opening of the accommodating space. At least one of the connecting straps is detachably coupled to the engaging portion, and the opening is enlarged by disassembling the connecting strap to achieve the convenience of wearing and detaching.一種呼吸器面罩固定結構,包括有一面罩固定片及一帶狀頭套。面罩固定片具有一用以套接呼吸器面罩之套接孔,以及複數個接合部;帶狀頭套具有複數個綁帶圍成一可供患者頭部容置的空間,並自綁帶延伸出複數個連接帶且一對一地連接於接合部,上述綁帶與連接帶構成容置空間之開口。其中至少一個連接帶係可拆卸地連接於接合部,藉由拆卸連接帶使開口變大,以達到穿脫方便之功效。