Abstract: A sidecar for a bicycle comprises a wheeled frame formed of a single U-shaped tube adapted to be readily attached to a bottom portion of the bicycle frame via a single bracket. The bracket includes an elongated horizontal portion projecting forwardly of the power train of the bicycle for slidably receiving thereon a first end portion of the U-shaped tube. A circumferential slot is defined in the first end portion of the tube for receiving a pin rigidly secured to the elongated portion of the bracket, thereby allowing limited rotational movements of the bicycle frame relative to the sidecar.