An exhaust pipe structure for a vehicle includes a vehicle body frame, a pair of occupant seats, and an exhaust pipe. The occupant seats include a driver's seat and a passenger seat and are disposed side by side in a vehicle width direction in a center frame portion. An internal combustion engine is disposed behind the occupant seats and supported substantially on a center line of the vehicle body in a rear frame portion. The exhaust pipe is connected to the internal combustion engine behind the occupant seats. The exhaust pipe extends outward in the vehicle width direction from the internal combustion engine, thereafter, is bent substantially in a U-shape to extend inward in the vehicle width direction, and then extends substantially onto the center line of the vehicle body. A muffler is connected to the exhaust pipe.