A saddle ride type all-terrain vehicle having an engine and a saddle type driver's seat, includes a first sensor for detecting an inclination in the left-right direction of the vehicle, a second sensor for detecting an inclination in the front rear direction of the vehicle, and a controller receiving outputs from the first and second sensors, determining a tumble condition based on the outputs, and then outputting a tumble condition signal. Further, a fuel shut-off element is provided for shutting off the supply of fuel to the engine when the tumble condition signal is received from the controller.