PROBLEM TO BE SOLVED: To provide a coinjection device capable of efficiently executing coinjection processing including an agitation process of agitating chemical.SOLUTION: A coinjection device 1 comprises: a coinjection processing part 300 capable of executing coinjection processing of injecting a chemical within a first container into a second container on the basis of preparation data and a coinjection control part 100 which controls the coinjection processing part 300. In the coinjection processing based on first preparation data by the coinjection processing part 300, the coinjection control part 100 can use the chemical in the first container loaded previously to the coinjection device 1 in association with second preparation data different from the first preparation data.SELECTED DRAWING: Figure 27COPYRIGHT: (C)2018,JPO&INPIT【課題】薬品を攪拌する攪拌工程を含む混注処理を効率的に実行することが可能な混注装置を提供すること。【解決手段】混注装置1は、調製データに基づいて第1容器内の薬品を第2容器に注入する混注処理を実行可能な混注処理部300と、前記混注処理部300を制御する混注制御部100と、を備える混注装置であって、前記混注制御部100が、前記混注処理部300による第1調製データに基づく前記混注処理において、前記第1調製データとは異なる第2調製データに対応付けて予め前記混注装置1に装填された前記第1容器内の薬品を使用可能である。【選択図】図27