< Topic > As production cost is held down, handling being simple, securely the pre- filled type point nose instrument which liquid medicine spraying it is possible inside the nostril is offered.Solutions When the syringe barrel one side has the person in charge stopping section of the spraying hole and center stopper on side, has the continuity section of the liquid medicine for the said person in charge stopping section, on other edge side the inside perimeter aspect compared to the sudden facilities section which sudden facilities is done is formed in inner split, at the same time as for the plunger, on the abbreviation center of axial direction the peripheral aspect compared to the sudden facilities section which sudden facilities is done is formed in outside direction, engages both sudden facilities section, makes the plunger the spraying hole direction of the syringe barrel move and gets over the plunger side sudden facilities section and cancelling engagement, with the pressure above specified it is added,The liquid medicine makes center stopper spraying hole direction move, the liquid medicine influx groove being formed with the said continuity section and the center stopper which were formed to the center stopper person in charge stopping section, with of the liquid medicine storage section and the spraying hole communicates, in order the liquid medicine to become spraying possible, is constituted.【課題】製造コストを抑えるとともに、取扱いが簡単で、確実に鼻孔内に薬液噴霧できるプレフィルド型点鼻器具を提供する。【解決手段】シリンジバレルは一方側に噴霧孔とセンターストッパーの係止部を有し、該係止部には薬液の導通部を備え、他端側に内周面よりも内方に突設した突設部が形成され、且つプランジャーは、軸方向の略中央に外周面よりも外方に突設する突設部が形成され、両突設部は係合し、プランジャーをシリンジバレルの噴霧孔方向に移動させてプランジャー側突設部を乗り越え係合を解除する時には、加えられる所定以上の圧力によって、薬液がセンターストッパーを噴霧孔方向に移動させ、センターストッパー係止部に形成された該導通部とセンターストッパーとの間に薬液流入溝が形成されて、薬液貯留部と噴霧孔との間が連通し、薬液が噴霧可能となるように構成されている。
