To provide a new stud structure by which the problem of loosening during usage is dissolved while a main body part is made of a plastic material when plastic material-made studs are used in sports shoes such as golf shoes.

The stud 1 for the sports shows is formed by a plastic material- made stud mainbody 2 and a metallic core member 3. The stud mainbody 2 is provided with a flange part 4 and a screw shaft part which is extended from one surface and where a screw is formed on an outer peripheral surface. A shaft hole is formed through the flange part 4 and the screw shaft 5 part and a slit extending to the free end of the screw shaft 5 part is formed in the screw shaft 5 part in an axial direction. A core member 3 is inserted to the shaft hole of the stud mainbody 2 so as to be fixed to it. The core member 3 is constituted so as to push and widen the screw shaft 5 outwardly in an external direction when it is inserted to the shaft hole of the stud mainbody 2.