The object of this invention is to provide an operating panel for an engine which would require a smaller number of parts for throttle mechanism, operation panel and the related components. It also requires fewer assembly processes, and improves the outer appearance of the engine. In this operating panel, a cut-off switch to stop the engine is installed in a custom-designed cover, which has a cut-off terminal electrically isolated from a ground, and can electrically ground the cut-off terminal by making a contact with the throttle lever electrically grounded. The operational panel is easily fixed to the fan cover by engaging a protrusion and a hole. The operational panel has a groove to run a fuel pipe.