A guide system (1) for a sliding door (101) comprises a pair of guides (3, 4) opposite each other to receive the respective opposite edges (103, 104) of a door (101); lifting means (5) for switching the door (101) from a resting position to a sliding position; the lifting means (5) is configured to produce a magnetic field inside one of the guides (3, 4) so as to bring the door (101) from the resting position to the sliding position.