<p>A lock device enabling the suppression of the binding of lock members during unlocking operation and the suppression of a variation in the engaging timings of the plurality of lock members during locking operation when the plurality of lock members are operated by a cam member. The guide parts (14) of a lower guide (15) comprise a plurality of cam guide faces (14a) disposed apart from each other along the circumferential direction. A cam (13) comprises a plurality of guided faces (13b) in contact with the plurality of cam guide faces (14a) in a phase released state. The guided face (13b) positioned in the eccentric direction of the cam (13) by the energizing force of a lock spring (16) is extended to a released phase side relative to the other guided faces (13b).</p>
