Although the mask (102) you keep in sealing up position of the face of the user the band string (108) with, the mask (102) with the mask installation assembly body (104) with the patient boundary device (100) provide, one band string (108) the patient boundary device (100) connect at least the mask installation device which is used (10). The mask (102) from the person in charge stopping element which stretching is done (12) the mask installation device (10) it provides, the frame (14) with the frame (14) the flange which possesses the diameter which is larger than diameter (16) with the person in charge stopping element (12) it provides. The grip element arm (20) and the fastener (28) the grip element (18) it provides. The grip element arm (20) the 2nd end (24), the 2nd end (24) the open part which is penetrated (26) it possesses. The mask installation assembly body (104) the band string (108) the fastener which is connected (28), the grip element arm (20) the 1st end (22) it is installed. The flange (16) getting over, the grip element arm (20) the open part (26) the person in charge stopping element (12) the frame (14) adjoining, it engages, the person in charge stopping element (12) the grip element (18) person in charge stopping does.< Selective figure >Figure 2帯紐(108)により使用者の顔面の密封位置にマスク(102)を保持し、マスク(102)とマスク取付組立体(104)とを患者界面装置(100)に設けて、少なくとも1つの帯紐(108)を患者界面装置(100)に接続するのに使用するマスク取付装置(10)。マスク(102)から延伸する係止要素(12)をマスク取付装置(10)に設け、軸部(14)と軸部(14)の直径より大きい直径を有するフランジ(16)とを係止要素(12)に設ける。把持要素アーム(20)及び留め具(28)を把持要素(18)に設ける。把持要素アーム(20)の第2の端部(24)は、第2の端部(24)を貫通する開口部(26)を有する。マスク取付組立体(104)の帯紐(108)を接続する留め具(28)は、把持要素アーム(20)の第1の端部(22)に取り付けられる。フランジ(16)を乗り越えて把持要素アーム(20)の開口部(26)を係止要素(12)の軸部(14)に隣接して係合し、係止要素(12)に把持要素(18)を係止する。【選択図】図2