The steering handlebar for outboard motor provided herein includes a power tilt and trim switch for adjusting a trim angle and a tilt angle of the outboard motor. The switch is advantageously mounted to the handlebar at a position that provides good operability. In one embodiment, the switch is mounted on a sideways-facing surface of the handlebar, forward of the accelerator grip. The switch does not rotate together with the accelerator grip of the handlebar, which results in the switch always being visible to the operator and easy to operate. Further, the lack of rotational coupling of these two components reduces wear on a lead wire of the switch, thereby prolonging the lifespan of the lead wire and the switch.