To improve safety and working efficiency by making a fastening tool by a leg part and a head part whose diameter is increased from one end of the leg part and constituting the fastening tool by a guide bar, a fixing member which performs a fixing, being forcibly fitted from one end side, and has a member fixing part on the other end side and a split pin sticking a member.

A guide bar 24 is constituted to have a length to go out to the outside of a hole 16 in the vicinity of the other end side, even if the guide bar 24 is inserted into the hole 16 provided on wood 12 from one end side. A head part 20 is gradually thickened so as to form a slope 34 from the leg part 18. A screw thread is formed on the outer periphery of a fixing member 30 and the fixing member 30 can be screwed into the hole 16, being forcibly fitted into the hole 16. When the fixing member 30 is screwed into the hole 16, a member fixing part 28 is constituted by a length in which the member fixing part 28 goes out to the outside of the hole 16 and the other end coincides with the other end of the guide bar 24. The member fixing part 28 is provided with a screw thread so that a bolt 38 may be screwed. A split pin 32 is divided into 6 divided pieces 36 at one end, the pin 32 fits into a clearance 26, the pin 32 is spread along the slope 34 of the guide bar 24 and the pin 32 is stuck from the tip of the divided piece 36 to wood 12.