A light weight nasal respiratory mask system securing airtightness of a mounting section between a nasal mask and a frame is provided. A nasal respiratory mask system contacting the face of a user to supply respiratory gas under positive pressure to the nose of a use and comprising at least a nasal mask, a frame and a retention wire, in which the nasal mask is a tubular member composed of a face contacting section constructed from an elastic body at one end of an opening and a frame mounting section constructed from an elastic body at the other end of the opening, the frame is a molded part with an internal space capable of communicating between a hose to supply positive pressure gas and the nasal mask and has a mechanism connectable with the hose to supply positive pressure gas and a nasal mask mounting section allowing the nasal mask to mount on periphery thereof, the frame mounting section of the nasal mask is mounted to cover from the outside the nasal mask mounting section of the frame, and at least part of the retention wire has a structure to tighten the frame mounting section of the nasal mask to the side of nasal mask mounting section of the frame.本發明係提供一種可確保鼻罩與框體之嵌合部之密封性,且重量甚輕之呼吸用鼻罩系統。該呼吸用鼻罩系統係用以與使用者之顏面接觸而朝使用者之鼻供給呼吸用正壓氣體者,且該系統至少由鼻罩、框體及固定線構成;該鼻罩係一筒狀構件,其中一開口端為彈性體構成之顏面接觸部、另一開口端為彈性體構成之框體安裝部;該框體係一具有可連通正壓氣體供給管與鼻罩之內部空間的成形體,並具有可與正壓氣體供給管連接之機構、及其外周可裝設鼻罩之鼻罩裝設部;鼻罩之框體安裝部係以由外側包覆框體之鼻罩裝設部之狀態安裝,且固定線至少一部分係形成將鼻罩之框體安裝部緊固於框體之鼻罩裝設部側之構造。1‧‧‧鼻罩本體2‧‧‧鼻罩之顏面接觸部3‧‧‧鼻罩4‧‧‧框體安裝部5‧‧‧框體6‧‧‧鼻罩裝設部8‧‧‧固定線9‧‧‧固定線突出部(止回爪安裝部)10‧‧‧固定線突出部(頭套帶安裝部)11‧‧‧呼吸用鼻罩系統12‧‧‧止回爪
