The present invention, by operating a button to flow into the drug solution balloon should further administered to the administration subject such as a patient, the drug solution is chemical liquid stored in the balloon the balloon is inflated by inflow inflated balloon itself restores because to discharge the chemical liquid stored in the balloon while contraction in force, to provide a chemical solution administration device that can be sustained during a certain period of time the additional administration of the drug solution without continuous button operation. .FIELD 6本発明は、ボタンを操作すれば患者などの投与対象にさらに投与すべき薬液がバルーンに流入し、薬液が流入することによってバルーンが膨脹してバルーンに薬液が貯蔵され、膨脹したバルーンが自体復元力で収縮しながらバルーンに貯蔵された薬液を排出するので、薬液の追加投与を継続的なボタン操作なしに一定時間の間に持続することができる薬液投与器を提供する。【選択図】図6
