An operation input device excellent in an operation feeling, capable of smooth rotation and having less occurrence of dust includes a base; a support shaft elastically implanted to and supported by the base in such a manner as to be capable of tilting; a printed substrate equipped on an upper surface thereof with a plurality of bush button switches and Hall IC mounted thereto, and put on and integrated with the base; an operation plate arranged on the printed substrate; and an operation dial having a ring-like magnet having N poles and S poles alternately arranged on a lower surface thereof and supported to an upper end portion of the support shaft in such a manner as to be capable of rotation. The Hall IC and detect the change of a magnetic flux of the ring-like magnet and a rotating direction when the operation dial is rotated, and the push button switches are driven through the operation plate when an outer peripheral edge portion of the operation dial is pushed down.