Steering handle device for outboard engine system

In a steering handle device including a tilting switch, an overhang portion is formed on a switch case detachably secured to a lower surface of a steering handle, and protrudes from a side of the steering handle toward a side where a steersman is in position. A tilting switch is mounted in a switch-mounting bore which is open at a rear slant wall of the overhang portion. Thus, the steering handle can be also used commonly in an outboard engine system including no tilting switch.