Provided is a catheter which comprises a connectable and disconnectable portion and comprises high operability. A catheter (1) includes a sheath (2) that is inserted into a lumen； a drive shaft (42) that transmits mechanical drive force； a hub (31) that moves the drive shaft (42)； an outer tube (32) that is provided in the sheath (2) on a proximal side and comprises a first connector (372) at a proximal portion； an inner tube (34) that can move inside the outer tube (32)； a second connector (35) that can be connected to and disconnected from the first connector (372) and can receive the inner tube (34)； a sheath connection portion (33) that connects the sheath (2) and the outer tube (32)； and a protective tube (67) that protrudes toward a distal side further than the inner tube (34), accommodates the drive shaft (42), can be inserted into the outer tube (32) and the sheath (2), and can be pulled out of the outer tube (32) together with the hub (31) and the inner tube (34) as the second connector (35) is disconnected from the first connector (372).
