To provide a fitting structure for fishing rods that is readily controllable in fine adjustment and can retain sufficiently fitting power for a long period of time.

The female fitting part 12 is a tubular material that is inserted its rod root side into the recessed part 10c of the tail plug 10. The space S occurs between the female fitting part 12 and the root rod 1 all over the circumferential direction by the difference between the inner diameter of the large diameter part 1b of the root rod 1 and the inner diameter of the recessed part 10c. In the meantime, the root upper rod 2 has the female screw 2b formed on the inner circumferential face on the rod root side and the male fitting screw 15 is detachably screwed to the female screw 2b. This male fitting part 15 is fitted to the female fitting part 12 and the root upper rod 2 is fitted and fixed to the root rod 1 as it is received into the root rod 1.