To provide an excavating body capable of accurately excavating even a small-diameter underground hole on a route with a high degree of freedom so as to excavate by correcting a direction in the existance of an obstruction.

This excavating body is provided with an excavating head and a rod unit connected to the rear side of the excavating head, and excavating an underground hole by advancing the excavating head. The rod unit has a plurality of rod members disposed in an axially adjusted manner, and the adjacent rod members are connected by shaft members mounted almost orthogonally to the axis Z of the rod unit, through elastic members.