Relates medical bag in which a plurality of compartments inside the cavity is separated by the seal portion, even it your time of sterility assurance function erroneous arises is left infusion unopened without compromising any work produced reliably eliminated and an object thereof.
Upper and lower film layers in the medical bag (10) is a weak seal portion by being welded at a low temperature over the entire length of the width direction (18) is formed, the compartments (20, 22) above and below the weak seal portion (18) They are separately formed. Outlet (12) is mounted at strong seal part (14A) to the drug bag. Outlet (12) extends the lower partition (22) to the vicinity of the weak seal part (18), the upper end (12A) is opened above the drug liquid level in the compartments (22) (L) . Outlet (12) is provided with a communication hole (26) at the lower end, the shaded portion (opening portion (28)) in the medical bag inner surface peelably welded to the opposing surface of the outlet (12), the communication hole (26) It has been closed. Welding strength of the opening and closing portion (28) is somewhat larger than that of the weak seal portion (18).