Provided is a medical administering set capable of satisfactory administering therapy by preventing the mixing of foreign substances into a liquid object stored within a medical container, leakage, etc. by reliably connecting the medical container to a tube while the liquid-tight properties of the medical container are maintained. A sealing section having ribs is formed on the protrusion of a boat-shaped port with connection sections located therebetween. Slits communicating with a flow path are formed directly under the ribs. The ribs are engaged with engagement sections of a connector, and the connector is rotated in a liquid-tight state to lock the connector with the boat-shaped port side. This operation breaks the connection sections, and in the liquid-tight state, the flow path is opened to the inside of the connector.
