An elongate member housing tool assembly includes a distal end side tubular member disposed ON the distal end side and a proximal end side tubular member disposed ON the proximal end side, which accommodate an elongate member and a liquid inlet port to which a liquid supplying tool for supplying liquid into the distal end side tubular member is removably connected and which is provided ON the distal end side tubular member. The distal end side tubular member and the proximal end side tubular member are wound spirally and the proximal end of the distal end side tubular member and the distal end of the proximal end side tubular member are disposed in a spaced relationship from each other. A distal portion of the guide wire is accommodated in the distal end side tubular member and except possibly the most distal portion of the elongate member.
