When a bicycle with no auxiliary wheel turns at a curve, the driver inclines the vehicle body to take balance, but in the case where an auxiliary wheel is mounted to the bicycle, the conventional support arm that connects the bicycle and the auxiliary wheel is not bent, and therefore, the vehicle body does not fall, but on the other hand, it is impossible to do the practice to take balance by inclining the vehicle body, and it has been difficult to learn the driving technique. Furthermore, when the auxiliary wheel rises on a little projection on the road surface, the rear wheel of the bicycle is separated from the road surface, and the rotation of the rear wheel is not transferred to the road surface, so that the running has become impossible. The present invention eliminates these disadvantages. An auxiliary wheel support arm with inclination function comprises: an auxiliary wheel support arm; and a bicycle support arm, wherein the auxiliary wheel support arm and the bicycle support arm connect the bicycle and the auxiliary wheel, the auxiliary wheel support arm partially overlapping with the bicycle support arm, the bicycle support arm and the auxiliary wheel support arm being vertically movably pivoted to each other at the end near to the bicycle in the overlap portion, the bicycle support arm and the auxiliary wheel support arm bound by a T-shaped binding bar and an elastic member in the overlap portion. |