[Task] Provided is a medical elongated body which can be smoothly put in and taken out with respect to a living body in a low-invasive manner and which can prevent an imprudent movement from occurring while being in use. [Solution] A hydrophilic lubricating coating layer 160 which exhibits lubricating characteristics when wet, and a temperature responsive lubricating coating layer 170 which exhibits hydrophilic characteristics and lubricating characteristics at a temperature lower than a critical temperature when wet and exhibits hydrophobic characteristics and non-lubricating characteristics at a temperature equal to or higher than the critical temperature when wet are formed on an outer surface of a sheath tube 110. The temperature responsive lubricating coating layer is disposed on a proximal side of the hydrophilic lubricating coating layer and is formed on a proximal side of the sheath tube.
