Endoscope treatment system

An endoscope treatment system comprising:

• an endoscope treatment tool that has (i) an operating section including a distal end and a proximal end, (ii) a sheath that is connected to the distal end of the operating section and is formed with a lumen into which a guide wire is capable of being inserted, and (iii) a first opening that is provided at the operating section so as to communicate with the lumen;
• a guide wire holder that (i) has a tube member in which the guide wire is accommodated, (ii) includes a radially inner portion that is wound circumferentially and a radially outermost portion that is wound around the inner portion, the inner portion and the outermost portion being concentrically wound in a circular shape, and (iii) has an end portion with a second opening from which the guide wire is capable of protruding from the tube member;
• a fixing member that couples the operating section to the guide wire holder so that the distal end and the proximal end of the operating section are located outside of the outermost portion;
• and
• a holding fixture that holds the end portion of the guide wire holder so that the end portion is biased from the outermost portion toward the inner portion so as to overlap the inner portion and so that the second opening faces the first opening,
• wherein the guide wire is exposed between the first opening and the second opening so as to be capable of being operated at a space further radially inward than the inner portion of the guide wire holder.