Input apparatus for vehicle-installed instruments

A input apparatus for vehicle-installed instruments includes main input unit (operation unit) being placed in the proximity of a driver's seat for a user (driver) to switch a plurality of indicators displayed on a display screen into a selection mode and select any desired one of the indicators, thereby operating a vehicle-installed instrument. The main input unit includes leg parts and a palm support part extended in a lateral direction from the upper ends of the leg parts, a plurality of operation switches are placed on the opposite side of either of the leg parts to the extension direction, and an operation dial is placed on a side of the palm support part, enabling the user to move the indicators displayed on the display screen and switch one of the indicators into a selection mode by operating the operation switches and the operation dial.