PURPOSE: To prevent blood bag certainly and easily from mistaking.

CONSTITUTION: When a bar-code 2A on a card 3 which a patient has brought is read by a bar-code reader 4, a printer 5 is actuated by control of a control means 9, and the read bar-code 2B corresponding to the information pertaining to the patient is printed on a pair of labels 6. One of them is attached to a blood bag 11 while the other is attached to a storage vessel 8. The blood of the patient is sampled to the bag 11, followed by reading of the bar-code 2A on the card 3, bar-code 2B on the bag 11, and bar-code 2B on the storage vessel 8, and upon checking their identicalness, the blood bag 11 is accommodated in the storage vessel 8 followed by locking. When bag 11 is to be taken out of the storage vessel 8, the bar-code 2A on the card 3 and the bar-code 2B on the storage vessel 8 are read, and if their identicalness is confirmed, an electronic lock device 7 is unlocked and it is possible to take out the blood bag 11.