Lifting method for lesion area, and anchoring device

A lifting method for a lesion area, comprising:

• a step of introducing at least three anchoring tools, each having its own separate soft magnetic body and an anchor into a hollow organ having a lesion area, by using a working channel inserted from a natural opening into the hollow organ;
• a step of anchoring the at least three anchoring tools, by sequentially placing the at least three anchoring tools in predetermined positions outside of the lesion area to define a border between a normal tissue area and the lesion area so as to arrange a plurality of the soft magnetic bodies which are not attracted to each other around the lesion area in a state that the plurality of the soft magnetic bodies are unmagnetized;
• a step of creating at least three lifting points using the at least three anchoring tools around the lesion area including the normal tissue;
• and
• a step of lifting portions including the border between the normal tissue area and the lesion area and being around the at least three lifting points in a substantially vertical direction with respect to the lesion area by magnetizing the at least three soft magnetic bodies using a magnetic field generation tool arranged on the outside of the hollow organ so that the at least three anchoring tools are attracted to the magnetic field generation tool.