[problem] and the abnormal development of blood vessels in the injection of preparation at an early stage, the object of the present invention to provide a monitoring system using the intravascular injection monitoring device, and it can accurately objective judgment. The A drug solution and infusion such formulation injection device for administering into a blood vessel, and the detected injection device for injecting the detected agent to the injection path, the flow into the vessel to be characterized by a detecting device for detecting the detectable agent.FIELD 1【課題】製剤の血管内注入の異常発生を早期に且つ、正確に客観的な判断ができる血管内注入監視装置及びそれを用いた監視システムの提供を目的とする。【解決手段】薬液及び輸液等を血管内に投与するための製剤注入装置と、当該注入経路に被検出剤を注入するための被検出剤注入装置と、血管内に流れる前記被検出剤を検出するための検出装置とを備えたことを特徴とする。【選択図】 図1