A conveyor for transporting products includes a mounting frame for one or more product feed lanes, each lane being defined by a respective conveyor belt which extends along a respective path, and by element for centering the products on the conveyor belt and including respective first and second lateral guides which are spaced from each other transversely to the direction of extension of the conveyor belt in order to define a track having a respective width. A unit for adjusting the distance between the guides are provided which includes a first transversal support and movement member for the corresponding lateral guide of the lane, and a second transversal support and movement member for the other lateral guide of the lane. Also provided is a respective transversal member for supporting the first and second support and movement members and a defining unit for fastening to the conveyor frame.