According to an in-vehicle control apparatus, it is configured to receive information of a plurality of operation keys displayed on a display, to identify from a result of voice recognition of a user's speech, the operation key corresponding thereto on the basis of the information of the operation keys, and to execute a function assigned to the operation key upon receiving an instruction for execution by the user using a decision key, so that it is possible to perform an operation without making contact directly with the plurality of operation keys displayed on the display and without the need of a complex key operation. Further, solely by mounting just one decision key on a steering wheel, it becomes possible to safely perform the operation about the operation key displayed on the display without the user releasing his/her hand from the steering wheel during driving.