An exhaust apparatus includes an exhaust pipe passing under the front floor and rear floor and extending toward the rear of the vehicle. A noise eliminator is arranged under the rear floor and a fuel tank is arranged in a side portion in the vehicle width direction of the noise eliminator. A portion of the exhaust pipe on the front side of the front floor and a portion on the rear side of the noise eliminator are elastically mounted to the vehicle body. The exhaust pipe and a portion on the side opposite to the side of the fuel tank at a lower surface portion of the front floor are coupled by a metal wire having slack in an intermediate portion therebetween. In a side impact to the vehicle body, the fuel tank and noise eliminator do not interfere with each other.