PURPOSE: To provide a chassis for a small-sized winch capable of being installed by one action and disjointed so as to simplifying material collecting work in forestry, especially that in a mountain requiring hands.

CONSTITUTION: A winch 6 using a cut root 10 as a base anchor is combined with a chassis plate 8 and an anchor plate 9. A cut made on the cut root 10 is meshed with the anchor plate 9 and made into the anchor for the winch 6. In disjointing, a driver or a sliver is inserted into an elliptic hole 11 of a specific nail 3 driven into the cut root 10 and the driver or the silver is rotated several turns right or left to easily extract the nail.