In a vehicle exhaust system, downstream end portions of front and rear exhaust pipes Ef, Er which respectively connect to front and rear cylinder banks are arranged side by side with each other in the same direction so as to be connected to a common collecting exhaust pipe 22, so that exhaust gases flowing through the front and rear exhaust pipes Ef, Er are allowed to flow into the common collecting exhaust pipe 22 in the same direction. Mating faces 15f, 20f are respectively formed on the end portions of the front and rear exhaust pipes Ef, Er which are located closer to the collecting portion, and the mating faces 15f, 20f are confronted from each other. The mating faces are inclined relative to a plane (P-P) passing through centers Ca, Cb of the front and rear exhaust pipes Ef, Er.