A dial operation device for a vehicle including a plurality of dial devices each having a dial knob and a dial element outputting a signal corresponding to a turned position of the dial knob, a plurality of circuit boards on which the dial devices are mounted, wiring members electrically interconnecting the circuit boards, and a board supporting body having a panel with a plurality of through-holes for inserting the dial devices therethrough and individually supporting the circuit boards such that the dial knobs protrude toward a front of the panel through the through-holes, wherein the circuit boards are supported in the body such that at least one of the circuit boards is positioned out of a plane of another one of the circuit boards.