To provide a coupling structure between a wire and a spring to prevent the generation of noise during slide movement of a coupling member and the occurrence of a trouble, such as deviated wear.

In a coupling structure, the upper surface 42 and the bottom surface 62 of a coupling member 36 to couple a wire 20 and a tensile coil spring 30 are rotatably held by the recessed parts 84 and 96 of a guide member 76 and with this state, slidably moved through a guide hole 80. Further, elastic deformable claw parts 90, 92, 102, and 104 are formed in the recessed part 84 and 96. Thus, even when a torsion occurs to the tensile coil spring 30, the coupling member 36 is rotated in a state to be held at the recessed parts 84 and 96. Beside, since claw parts 92-104 are elastically deformed and excessive rotation of the coupling member 36 is prevented, one-sided contact of the coupling member 36 and the generation of noise during movement are prevented from occurring.