A switch apparatus includes a base module including a base case; a manipulation module including a manipulation case, and a grip mounted on an external circumferential surface of the manipulation case; a magnetic mechanism including a base-side magnetic unit provided to the base module, and a manipulation-side magnetic unit provided to the manipulation module; and a grip force sensing unit provided between the manipulation case and the grip, wherein the grip force sensing unit detects whether a grip force applied to the grip is greater than or equal to a predetermined threshold, and the magnetic mechanism is configured to vary a magnetic force generated between the base-side magnetic unit and the manipulation-side magnetic unit in accordance with a magnitude of the grip force detected by the grip force sensing unit.