A cable coupling mechanism 1 including a slider 2, and a slider housing member 3, wherein the slider 2 has cable connecting portions 22a, 22b to which cables C1, C2 are connected at both end in a sliding direction D1, the slider housing member 3 includes a main opening 36 opened in a direction D2 perpendicular to a sliding direction axis and a cable insertion opening 37a, 37b, the cable coupling mechanism 1 includes a movement-restricting mechanism R capable of restricting the slider 2 from moving in the direction D2, the movement-restricting mechanism R includes a housing member-side contact portion R1 and a slider-side contact portion R2 being contactable with the housing member-side contact portion R1 when a force in the direction D2 is applied to the slider.