Treatment device for endoscope

A treatment device for an endoscope comprising:

• a needle pipe having flexibility and formed in an elongated shape;
• a hollow shape section having an inner cavity formed in a distal end section of the needle pipe, and a side hole that is formed on an outer side surface of the needle pipe and communicates with the inner cavity;
• a piercing section provided closer to a distal end side of the needle pipe than the hollow shape section and formed with a pointed tip;
• a collection member including a cutting edge section that is formed in a pointed shape toward a radial outer direction of the needle pipe and is configured to protrude and retract between a position at which the cutting edge section is housed in the hollow shape section and a position at which the cutting edge section protrudes from the side hole;
• and
• an operating member including a distal end portion connected to the collection member, the operating member being provided so as to be advanceable and retractable relative to the needle pipe,
• wherein the cutting edge section protrudes from the side hole when the operating member is displaced relative to the needle pipe.