Abstract: A wheel drive mode changeover apparatus designed to effect a changeover between (a) a two wheel drive mode having only rear wheels driven, (b) a first four wheel drive mode having front wheels and the rear wheels driven at a substantially equal peripheral speed, and (c) a second four wheel drive mode with the front wheels driven at a higher peripheral speed than the rear wheels. The wheel drive mode changeover apparatus includes a control rod for manually switching between the mode (a) and the mode (b) above. By assuming one position this control rod allows the wheel drive mode changeover apparatus to effect the changeover between the mode (b) and the mode (c) in accordance with a traveling condition of a vehicle.