PURPOSE: To make it possible to load and unload a fixing system without special tools and to reduce the trace created by a pin of the fixing system to a minimum by forming the pin body so that it has plural legs around its vertex, saw tooth-shaped edges are formed on outside of the legs, tips of the legs are sharpened, and the pin itself is shaped into an inverted 'V' and srides over a split base 6, and providing a cushioning material on the side of a weak board.

CONSTITUTION: A pin body is divided into two legs 3 around its vertex 2, saw tooth-shaped edges 4 are formed on outside of the legs, and tips 5 of the legs are sharpened. The pin body is also shaped into an inverted 'V' and its legs 3 stride over a split base 6 of a material 8 to be fixed. A cushioning material 10 is provided between a weak board 7 and the material 8 to be fixed. The material 8 can thus be fixed without any special tool, the pin can be easily removed, and the trace created by the pin can be restricted to small pinholes of the same diameter as the tips of the pin.