PROBLEM TO BE SOLVED: To provide a chemical solution administration device capable of reliably performing a connecting operation of a pusher member and a pusher operation unit during a preparatory operation for administering a chemical solution. SOLUTION: A chemical solution administration device 1 comprises a chemical solution storage unit 13 filled with a chemical solution, a pusher member 18, a pusher operation unit 22, a drive unit 15, a connection detection sensor 21, and a control unit. I have. The connection detection sensor 21 detects the connection between the pusher member 18 and the pusher operation unit 22. The control unit determines whether or not the pusher member 18 and the pusher operation unit 22 are connected based on the detection signal detected by the connection detection sensor 21. [Selection diagram] Fig. 1【課題】薬液を投与する準備動作時に、押し子部材と押し子操作部の連結作業を確実に実施することができる薬液投与装置を提供する。【解決手段】薬液投与装置１は、薬液が充填された薬液貯蔵部１３と、押し子部材１８と、押し子操作部２２と、駆動部１５と、連結検出センサ２１と、制御部と、を備えている。連結検出センサ２１は、押し子部材１８と押し子操作部２２の連結を検出する。制御部は、連結検出センサ２１が検出した検出信号に基づいて押し子部材１８と押し子操作部２２が連結したか否かを判断する。【選択図】図１
