Provided is a medicinal agent filling device which enables a worker to fill a container with a medicinal agent with reduced effort. A medicinal agent filling device (1) is provided with: a supply device (10) for supplying a medicinal agent, which is to be supplied, to a container (26) capable of being filled with the medicinal agent a holding body (20) having holding sections capable of holding the container (26) a conveyance device (30) for conveying the holding body (20) and moving the holding body (20) to a supply position at which the medicinal agent can be supplied from the supply device (10) to the container (26) held by any one of the holding sections and a detection section for detecting the holding body (20) located directly upstream of the supply position.
