JP2758148B

PROBLEM TO BE SOLVED: To properly and easily clean or disinfect a sealing connecting part of a hemocathartic device by constituting a coupler so that sealing positions at use time and cleaning or disinfecting time of the hemocatharic device become different from each other in the coupler to connect a joint tube part and a hemocathartic liquid tube of the blood purifier to each other. SOLUTION: A coupler 50 is composed of a coupler divided body 50a having the tube connecting end 52 and a coupler divided body 50b. In the coupler divided body 50b, the other end side is formed as a joint tube connecting part 54, and a step part 56 is formed in a joining part with the coupler divided body 50a, and an annular sealing member 58 is fitted and inserted here, and a ball lock mechanism 20 is arranged, and a sealing ring 59 is also installed between the sealing member 58 and the ball lock mechanism 20. When being connected with a joint tube part of a hemocatharic device, its tip part is inserted up to a position coming into contact with the sealing member 58, and a ball 22 of the ball lock mechanism 20 is fitted in and locked on a locking groove part, and a hemocathartic liquid tube and the hemocathartic device are liquid tightly connected to each other.