To reliably manage a driving angle when obliquely driving with a nailing machine.SOLUTION: A strut 20 is erected from a base 10 of a nailing guide jig 3. A tip of the strut 20 is provided with a cylindrical nose guide part 30 in which a nose 2b of a nailing machine 2 can be inserted. An axis Lof the nose guide part 30 is inclined by only a prescribed angle αwith respect to a line VL orthogonal to a ground plane 10a of the base 10.SELECTED DRAWING: Figure 1
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