A steering handlebar apparatus for a vehicle includes a rod-shaped steering handlebar having a hand grip at a distal end thereof, and also includes both a clutch lever and a hot start lever mounted thereon at a position proximal to the hand grip. A switch holder for holding various switches is mounted to the steering handlebar at a position proximal to the hand grip. The hot start lever is journaled on the lower surface of the switch holder so that the user can operate the hot start lever with the thumb of the hand which is holding the hand grip, and can simultaneously turn off the clutch lever with other fingers of the same hand. The inventive arrangement provides a steering handlebar apparatus for a vehicle which facilitates simultaneous operation of a handle lever and a hot start lever using the hand which is holding a hand grip of a steering handlebar.