System for automatic connection (1) between a tractor (2) provided with a connection point (4) and an implement (5) provided with at least one hitch (7) comprising: a 3D camera (9) carried by the tractor (2) and configured to continuously take images of the three-dimensional space S facing the implement (5)； a processor (15) configured to detect on the images a predetermined shape corresponding to the hitch (7) of the implement and to determine the spatial coordinates of the hitch with respect to the position of the tractor (2) in order to calculate a path Pi between the tractor (2) and the hitch (7). When the implement hitch (7) moves out of the field-of-view of the camera (9) the processor (15) is configured to detect on the images alternative reference points Ra to re-calculate the path Pi.
