Provided is a drug supply unit which supplies solid drugs, said supply unit comprising: a drug supply body having a drug accommodating portion that accommodates a drug, and a driven shaft portion that is provided so as to be rotatable in relation to the drug accommodating portion, and supplying a drug from the drug accommodating portion through rotational driving of the driven shaft portion； and a support body having a rotational drive source, and a driving shaft portion that is coaxially connected to the driven shaft portion, and is rotationally driven by the rotational drive source, and supporting the drug supply body while being detachable therefrom. The driven shaft portion has a driven shaft portion body, and a driven engagement member that can be moved in relation to the driven shaft portion body in the axial direction. The driving shaft portion has a driving shaft portion body and a driving engagement member that is fixed to the driving shaft portion body and engages with the driven engagement member. The driven engagement member is biased in the proximal direction so as to approach the driving engagement member. The drug supply unit is further provided with a rotation prevention portion which allows rotation of the driven engagement member when the drug supply body is mounted on the support body but prevents rotation of the driven engagement member when the drug supply body is separated from the support body.La présente invention se rapporte à une unité de distribution de médicaments qui distribue des médicaments solides. Ladite unité de distribution comprend un corps de distribution de médicaments comportant une partie logement de médicament qui permet de loger un médicament, et une partie arbre entraîné conçue de manière à pouvoir tourner par rapport à la partie logement de médicament, et à distribuer un médicament à partir de la partie logement de médicament par entraînement en rotation de la partie arbre entraîné； ainsi qu'un corps de support ayant une s
