A medical instrument distributing system of the present invention includes hospital terminals provided in multiple hospitals, a server placed in a manufacturer, which includes a computer system that processes orders/shipment of a disposable medical instrument based on inputted information that orders the disposable medical instrument from the hospital terminals. The hospital terminals and the server are connected by a wide area network to establish a system. In accordance with order information, ordered multiple disposable medical instruments are stored in a sterilization bag packages sealed after sterilization and are shipped to the ordering hospital. Thus, the number of complicated procedures in the hospital facilities can be reduced, and the distribution of medical instruments can be more improved.