(EN) In order to provide a dump truck with an obstacle detection mechanism capable of detecting obstacles to the rear of the vehicle, including the regions behind the rear end of the vessel, and in order to provide an obstacle detection method thereof, this dump truck with an obstacle detection mechanism capable of detecting obstacles around the vehicle using multiple radars provided around the vehicle is provided with a pair of radars (25, 26) arranged symmetrically relative to the vehicle center plane (C) rearwards of the case of the rear axle (71) and between connection units (73) connecting to rear suspension cylinders (72). The radars (25, 26) detect obstacles to the rear of the vehicle and are arranged such that the respective center axes of irradiation in the horizontal direction intersect and the center axis of irradiation in the vertical direction has a prescribed depression angle.