A rail wagon for rail-and-road combined transport and for loading and unloading a road load, said wagon comprising: - two end platforms equipped with bogies; - a tie connecting each end platform and comprising a middle part extending along the longitudinal axis of the rail wagon, and a fork with two arms provided at each of the longitudinal ends of the middle part of the tie, - a pivotally mounted structure that bears the road load, dissociably assembled with the two end platforms and situated above the tie between the two end platforms; - a connecting device provided between each distal free end of the arms of the forks and the facing end of each of the end platforms; characterised in that the distal free end of the arms of the forks comprises a horizontal plate having a through-hole, each connecting device comprising: - a pull ring comprising:. a first part directed towards the distal free end of the arm of the fork, the first part of the pull ring comprising two horizontal and parallel plates (18a, 18b), each having a through-hole, and between which is housed the distal free end of said arm of the forks,. a second part secured or shaped in one piece with the first part, said second part being extended by a rod whose free end is threaded and directed towards the end platform; - a pin mounted through the through-hole of the distal free end of the arm of the forks and through the through-holes of the pull ring to assemble the pull ring to said arm of the forks; - a receiving piece secured or shaped in one piece with the end platform, and having a through-hole through which the rod of the pull ring is engaged; - a nut screwed onto the threaded end of the rod of the pull ring emerging on the other side of the through-hole of the receiving piece; and - a locknut screwed onto the rod of the pull ring between the receiving piece and the first part of the pull ring; the nut and the locknut bearing against the receiving piece and sandwiching the latter in order to immobilise the rod of the pull ring in the receiving piece. - two end platforms equipped with bogies; - a tie connecting each end platform and comprising a middle part extending along the longitudinal axis of the rail wagon, and a fork with two arms provided at each of the longitudinal ends of the middle part of the tie, - a pivotally mounted structure that bears the road load, dissociably assembled with the two end platforms and situated above the tie between the two end platforms; - a connecting device provided between each distal free end of the arms of the forks and the facing end of each of the end platforms; - a pull ring comprising:. a first part directed towards the distal free end of the arm of the fork, the first part of the pull ring comprising two horizontal and parallel plates (18a, 18b), each having a through-hole, and between which is housed the distal free end of said arm of the forks,. a second part secured or shaped in one piece with the first part, said second part being extended by a rod whose free end is threaded and directed towards the end platform;. a first part directed towards the distal free end of the arm of the fork, the first part of the pull ring comprising two horizontal and parallel plates (18a, 18b), each having a through-hole, and between which is housed the distal free end of said arm of the forks,. a second part secured or shaped in one piece with the first part, said second part being extended by a rod whose free end is threaded and directed towards the end platform; - a pin mounted through the through-hole of the distal free end of the arm of the forks and through the through-holes of the pull ring to assemble the pull ring to said arm of the forks; - a receiving piece secured or shaped in one piece with the end platform, and having a through-hole through which the rod of the pull ring is engaged; - a nut screwed onto the threaded end of the rod of the pull ring emerging on the other side of the through-hole of the receiving piece; and - a locknut screwed onto the rod of the pull ring between the receiving piece and the first part of the pull ring;