Even while equipped with a can be connected and disconnected the site, to provide a catheter with high operability . and a sheath (2) to be inserted into lumen is inserted into the sheath (2), a drive shaft for transmitting the mechanical driving force (42), the distal end of the drive shaft (42) image information acquisition section that acquires and fixed in the image information (411), a hub for moving the axial direction on the drive shaft of the sheath (2) (42) by moving while holding the drive shaft (42) (31) If, which is provided on the base end side of the sheath (2), the outer tube comprising a first connector (372) to the proximal end (32), the base end of the outer tube (32) a first connector (372 ) and a second connector (35) with a connecting and detachable male connector portion (352) against, is provided on the distal end side of the hub (31), the outer tube in accordance with the movement of the hub (31) ( 32) is moved relative the outer tube (32) in a catheter having inward and through non-engaging portion of the second connector to the distal end (35) (341) within the provided pipe and (34) is (1).接続および切り離しが可能な部位を備えつつも、高い操作性を備えたカテーテルを提供する。管腔内に挿入されるシース(2)と、シース(2)内に挿入され、機械的駆動力を伝達するための駆動シャフト(42)と、駆動シャフト(42)の先端に固定されて画像情報を取得する画像情報取得部(411)と、駆動シャフト(42)を保持しながら移動することによりシース(2)の軸方向に駆動シャフト(42)を移動させるハブ(31)と、シース(2)の基端側に設けられ、基端部に第1のコネクタ(372)を備える外管(32)と、外管(32)の基端側に第1のコネクタ(372)に対して接続および切り離し可能な雄コネクタ部(352)を備えた第2のコネクタ(35)と、ハブ(31)の先端側に設けられ、ハブ(31)の移動に伴って外管(32)内で外管(32)と相対的に移動し、先端部に第2のコネクタ(35)の内側を通り抜け不能な係止部(341)が設けられる内管(34)とを有するカテーテル(1)である。
