Abstract: A recliner mechanism for a reclinable vehicle chair having a back frame pivotally mounted to a seat frame. The recliner mechanism includes a pair of members pivotally attached between the seat and back frames and relatively extensible and retractable to adjust the angle of inclination of the back frame to the seat frame. One of the members includes an elongate slot having a plurality of detents, and a handle is pivotally carried by the other member. The handle includes an element extending through and freely longitudinally slidable in the slot in release position of the handle. In a locking position of the handle the element is located within one of the detents and holds the back frame in a fixed position of adjustment relative to the seat frame.