An exhaust structure for a fuel cell vehicle includes a fuel cell for generating electrical power by inducing a reaction between hydrogen and oxygen and, a motor to generate motive power for supply to the rear wheel functioning as the drive wheel based on the electrical power generated by the fuel cell and, an exhaust pipe to convey byproducts in the fuel cell power generation process and, an exhaust port formed on the exhaust pipe opening towards the outer side of the vehicle frame, wherein the exhaust port is positioned more to the rear with respect to the front end of the rear wheel, and more specifically is formed further to the rear with respect to the rear wheel drive shaft. The exhaust structure so configured for fuel cell vehicles is capable of preventing byproducts from the fuel cell from reaching the drive wheel, even when struck by the wind, or when changing the turn radius.