Provided is a catheter which is provided with a connectable and disconnectable portion and which is very easily operable.A catheter (1) is provided with: a sheath (2) which is inserted into a lumen a drive shaft (42) which transmits mechanical drive force a hub (31) which moves the drive shaft (42) an outer tube (32) which is provided on the proximal end side of the sheath (2) and which has a first connector (372) provided at the proximal end thereof an inner tube (34) which is movable within the outer tube (32) a second connector (35) which is connectable to and disconnectable from the first connector (372) and which is capable of receiving the inner tube (34) a sheath connection section (33) which connects the sheath (2) and the outer tube (32) and a protective tube (67) which protrudes further toward the distal end side than the inner tube (34), receives the drive shaft (42), is insertable into the outer tube (32) and the sheath (2), and is capable of being pulled out of the outer tube (32) together with the hub (31) and the inner tube (34) while the second connector (35) is disconnected from the first connector (372).Linvention concerne un cathéter qui comporte une partie pouvant être accouplée et désaccouplée et qui est très facilement utilisable. Un cathéter (1) comporte : une gaine (2) qui est introduite dans une lumière un arbre dentraînement (42) qui transmet une force dentraînement mécanique un embout (31) qui déplace larbre dentraînement (42) un tube externe (32) qui est disposé sur le côté extrémité proximale de la gaine (2) et qui a un premier raccord (372) disposé sur son extrémité proximale un tube interne (34) qui peut se déplacer à lintérieur du tube externe (32) un second raccord (35) qui peut être accouplé au premier raccord (372) et désaccouplé de celui-ci et qui est apte à recevoir le tube interne (34) une section de liaison de gaine (33) qui relie la gaine (2) et le tube externe (32) et un tube de protection (67) qui fait saillie davanta
