Embodiments of the present invention provide a coinfusion apparatus capable of automatically performing parts or all of a coinfusion processing. The coinfusion apparatus includes a first robot arm which retains a medical agent container, a second robot arm which performs an operation of inserting a syringe needle of a syringe into a mouth of the medical agent container retained by the first robot arm, and an operation of inserting the syringe needle of the syringe into a coinfusion mouth of a transfusion bag. The coinfusion apparatus further includes a coinfusion processing room which shelters both robot arms and a transfusion bag elevation inclination section, which retains the transfusion bag outside of the coinfusion processing room and positions the coinfusion mouth of the transfusion bag in a coinfusion communication mouth formed in the coinfusion processing room. A trash storage room door is provided in a front surface of the coinfusion apparatus.
