An object of the present invention is to provide a sliding mechanism with which when a state of two connected members is changed to a plurality of states by sliding, the state can be changed from an arbitrary state to another arbitrary state without passing through the other state. The sliding mechanism of the present invention is disposed between a first member and a second member and includes a body to be guided arranged on the first member and a guide body arranged on the second member and guides the body to be guided. The guide body includes an annular guide groove which guides the body to be guided. The guide groove is a groove section composed of at least three sides including an arc-shaped side and a linear side.