Provided is a mixed injection device capable of efficiently executing mixed injection processing including an agitation step of agitating chemicals. The mixed injection device includes: a mixed injection processing unit that performs a mixed injection processing of injecting chemicals in the first container into the second container based on the preparation data a mixing step of mixing the chemicals in the first container used in the mixed injection processing , And the stirring step included in the mixed injection processing based on the preparation data can be executed before the execution start timing of the mixed injection processing based on the preparation data.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。 混注装置は、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する混注処理部と、前記混注処理で用いられる前記第1容器内の薬品を攪拌する攪拌工程で用いられる攪拌装置とを備え、前記調製データに基づく前記混注処理に含まれる前記攪拌工程を前記調製データに基づく前記混注処理の実行開始タイミングよりも前に実行可能である。
