A sliding door, comprising: a door capable of translating between an extreme position of opening and an extreme position of closing in order to enable, respectively, maximum discovery and obturation of a door compartment afforded in a vertical wall; the door having a greater height than the door compartment; first support and guide means comprising rotating organs, the latter comprising in turn a first wheel and a second wheel; wherein the first wheel and the second wheel are rotatably fixable to the vertical wall and are positionable superiorly of the door compartment such as to face the rear surface of the door; wherein the sliding door comprises guide organs having a longitudinal development, fixable to the rear surface of the door at the upper edge of the door such as to face the vertical wall, the guide organs comprising a rail suitable for restably slidingly engaging with the first wheel and the second wheel; wherein the sliding door comprises second sliding means comprising a third wheel and a fourth wheel; characterized in that: the third wheel and the fourth wheel are rotatably fixable to the door at the lower edge of the door, respectively to a first end and a second end of the lower edge of the door, for rotating on the floor and enabling translation of the door; the second sliding means comprise a first sliding group comprising: a first flexible plate, associated to the lower edge of the door, provided with a projecting fork able to support the third wheel having a rotation axis that is substantially coplanar to the first plate and destined to rest on the floor; the third wheel being destined to be partially disappearingly housed internally of an inferiorly open chamber (20, 200) provided at the lower edge of the door; and a second sliding group comprising: a flexible first plate, associated to the lower edge of the door, provided with a projecting fork able to support the fourth wheel having a rotation axis that is substantially coplanar with the first plane and destined to rest on the floor; the fourth wheel being destined to be housed partially disappearingly internally of a chamber (20,200) inferiorly open and provided at the lower edge of the door; each sliding group comprises: a plurality of second plates having a high elastic coefficient destined to be positioned in a stack on the first plate in order to give greater mechanical elasticity in accordance with a type of door to be supported and in accordance with the surface state of the floor on which the third wheel or fourth wheel rests. a door capable of translating between an extreme position of opening and an extreme position of closing in order to enable, respectively, maximum discovery and obturation of a door compartment afforded in a vertical wall; the door having a greater height than the door compartment; first support and guide means comprising rotating organs, the latter comprising in turn a first wheel and a second wheel; wherein the first wheel and the second wheel are rotatably fixable to the vertical wall and are positionable superiorly of the door compartment such as to face the rear surface of the door; wherein the sliding door comprises guide organs having a longitudinal development, fixable to the rear surface of the door at the upper edge of the door such as to face the vertical wall, the guide organs comprising a rail suitable for restably slidingly engaging with the first wheel and the second wheel; wherein the sliding door comprises second sliding means comprising a third wheel and a fourth wheel; the third wheel and the fourth wheel are rotatably fixable to the door at the lower edge of the door, respectively to a first end and a second end of the lower edge of the door, for rotating on the floor and enabling translation of the door; the second sliding means comprise a first sliding group comprising: a first flexible plate, associated to the lower edge of the door, provided with a projecting fork able to support the third wheel having a rotation axis that is substantially coplanar to the first plate and destined to rest on the floor; the third wheel being destined to be partially disappearingly housed internally of an inferiorly open chamber (20, 200) provided at the lower edge of the door; and a second sliding group comprising: a flexible first plate, associated to the lower edge of the door, provided with a projecting fork able to support the fourth wheel having a rotation axis that is substantially coplanar with the first plane and destined to rest on the floor; the fourth wheel being destined to be housed partially disappearingly internally of a chamber (20,200) inferiorly open and provided at the lower edge of the door; each sliding group comprises: a plurality of second plates having a high elastic coefficient destined to be positioned in a stack on the first plate in order to give greater mechanical elasticity in accordance with a type of door to be supported and in accordance with the surface state of the floor on which the third wheel or fourth wheel rests.