A medical bag includes: a bag body that is constituted by a flexible sheet material and that has an interior partitioned into a first space and a second space with a partition part therebetween； a first liquid that is received in the first space； and a second liquid that is received in the second space. The partition part is formed by sandwiching and melting the sheet material from both sides by an upper die, which is located further up in the vertical direction than the sheet material and has a surface temperature of 130-145 DEG C, and a lower die, which is located further down in the vertical direction than the sheet material and has a surface temperature 20-30 DEG C lower than the surface temperature of the upper die, and the sandwiched and melted sheet material is subjected to sterilization at 118-125 DEG C for 20-45 minutes to obtain the partition section. A ratio L1/L2 between the volume L1 of the first liquid 30 and the volume L2 of the second liquid 40 is 2.0-6.0, and the breaking strength of the partition section 5 is 5-25 kPa.本發明為提供一種醫療用袋，包含以具有可撓性的一片材所構成且內部透過一間隔部而隔出有一第一空間及一第二空間的一袋本體、收納於第一空間的一第一液體以及收納於第二空間的一第二液體，其中間隔部係藉由位於較片材為垂直方向的上側且表面溫度為130~145℃的一上模具與位於較片材為垂直方向的下側且表面溫度比上模具的表面溫度低20~30℃的一下模具夾置而熔接片材所形成，並以118℃~125℃進行20~45分鐘的殺菌而得到醫療用袋。其中將第一液體的體積L1與第二液體的體積L2的比例L1/L2為2.0~6.0，以及間隔部的斷裂強度為5~25kPa。藉此能防止不經意的剝離且使用時容易剝離。
