A respiratory mask system is provided, in which while wearing a respiratory mask system, force generated by movement of a users head and the like to induce laterally slipping a mask cushion may be reduced or absorbed. A respiratory mask system, which is provided with a mask cushion covering a nose, a nose and a mouth or a full face, a first frame connected with the mask cushion enabling to supply respiratory gas under positive pressure from a means for supplying respiratory gas under positive pressure, and a second frame connected with a headgear strap, in which the mask cushion is placed on a face side of the first frame, the first frame is placed on a face side of the second frame, a slide surface is formed at least a side of the first frame facing the second frame or a side of the second frame facing the first frame and the first frame is connected slidably with the second frame along the slide surface.本發明提供一種在呼吸用面罩系統裝設時,即使因使用者移動頭部等,而使面罩墊幾乎要移位至橫向之力作用時,亦可緩和或吸收此力之呼吸用面罩系統。本發明之呼吸用面罩系統包含有用以包覆鼻、鼻及口或顏面全體之面罩墊;連接前述面罩墊,以可供給來自呼吸用正壓氣體供給機構之呼吸用正壓氣體之第1框架;及連接頭套帶帶部之第2框架。前述面罩墊配置於前述第1框架之顏面側,前述第1框架配置於前述第2框架之顏面側,於前述第1框架之與前述第2框架相對之側及前述第2框架之與前述第1框架相對之側至少一者形成滑動面,前述第1框架與前述第2框架以可沿前述滑動面滑動之狀態連接。4...面罩墊5...面罩墊之顏面接觸部6...第1框架7...第1框架之滑動面8...第1框架之按壓部9...L形管10...第2框架11...第2框架之滑動面13...第2框架之頭套帶連接部15...與L形管連接之連接部
