To safely exfoliate an internal organ or the like from a surrounding connective tissue in an operation using a tracheal tube under observation with an endoscope.

This exfoliation tool is led through a tracheal tube and used to exfoliate the internal organ or the like of a body cavity from a surrounding connective tissue under observation with an endoscope. An insertion part 21 led through the tracheal tube is formed to have a diameter equal to or smaller than 12mm, and length equal to or smaller than 500mm. Brush bristles 22 are implanted on the forward end of the insertion part 21 and a handle part 23 is connected to the base end thereof.