A guiding device for a goods conveyor includes a support coupling with a fixed structure of the conveyor at least one sliding profile manufactured as a separate component with respect to the support structure and arranged for coupling with at least one corresponding grooved guide formed on the second side of such support structure and is oriented along the second axis. The grooved guide extends over the entire length of the support structure and includes a central rib arranged to abut against the rear surface of a respective sliding profile. The central rib divides the respective grooved guide into two cavities each having an L-shaped cross-section, so that linear projections are arranged to be inserted into a corresponding cavity of the grooved guide so that the free ends of the linear projections abut against respective abutment walls of the cavities.