A drug compounding management device and a coinjection device that are capable of easily managing the task of preparing a drug in preset group units. The drug compounding management device 1 according to the present invention comprises: a first evaluation process unit 113 for evaluating whether or not the coinjection device 2, which executes a coinjection process in which a drug in a first drug container is introduced into a second drug container, is capable of executing the coinjection process for a drug included in a preset group; and a second evaluation process unit 114 for evaluating whether the coinjection process for all drugs included in the group can be executed by the coinjection device according to the evaluation results derived from the first evaluation process unit 113.