A vari-focal lens includes power varying lens groups including a focusing lens group; a zooming ring; a focusing ring; a focusing lens frame supporting the focusing lens group; an intermediate moving frame supporting the focusing lens frame; a zoom cam ring; a focus cam ring which rotates with the zoom cam ring and is relatively movable thereto in the optical axis direction; and first and second cam followers formed on the focusing lens frame and intermediate moving member, respectively, which are engaged with focus cams of the focus cam ring. The focus cam ring moves in the optical axis direction relative to the focusing lens frame and the intermediate moving frame and rotates about the optical axis while being guided by the focus cams to thereby change a position of engagement of the first cam followers and the second cam followers relative to the focus cams.