Elevator apparatus with no machine room comprising: • a car which moves in the elevator shaft between two car guides (3a, 3b), a counterweight which moves in the elevator shaft between two counterweight guides (4a, 4b), wherein the plane formed by the two car guides (3a, 3b) is perpendicular to the plane formed by the two counterweight guides (4a, 4b), and wherein each of the counterweight guides (4a, 4b) is respectively located on opposite sides of the plane formed by the car guides (3a, 3b), • at least one drive and suspension element linked to the counterweight through a deflection pulley and to the car by means of deflection pulleys (6a, 6b) located below the car, • a drive unit, located in the upper part of the shaft above the path of the counterweight, • a traction sheave, driven by the drive unit, which transmits the movement to the car and to the counterweight by means of the drive and suspension element, and • a base (10, 10') supporting the drive unit, wherein the drive unit is integrally located in a first parallelepiped space limited first of all by one of the faces of a first vertical plane, which passes through the car guide closest to the counterweight and is perpendicular to the side wall of the shaft closest to the counterweight, and wherein there is a second parallelepiped space (P') located above the path of the counterweight limited first of all by the other face of said first vertical plane, wherein said first and second space (P, P') are likewise limited by: the horizontal plane passing through the upper ends of the counterweight guides (4a, 4b), the shaft ceiling, the side wall of the shaft closest to the counterweight, a second vertical plane (V2, V2') coinciding with the plane of the side wall of the car closest to the counterweight or with a plane (V2') parallel to the latter which goes into the car a few millimeters, and the front or rear walls of the shaft, characterized in that the drive unit consists of an engine, without a speed reducer, and in that the control unit of the elevator is in said second parallelepiped space (P'), and in that the base (10, 10') is supported and attached on one of the counterweight guides and on the car guide closest to the counterweight, and in that said base (10, 10') has a maximum length L B in millimeters fulfilling the ratio: L B ≤ L FH / 2 + K where L FH is the length in millimeters of the side wall of the shaft and K is the distance in millimeters between the middle plane of the traction sheave and the vertical plane formed by the two car guides (3a, 3b), wherein K is a constant value comprised between 50 and 1500. • a car which moves in the elevator shaft between two car guides (3a, 3b), a counterweight which moves in the elevator shaft between two counterweight guides (4a, 4b), wherein the plane formed by the two car guides (3a, 3b) is perpendicular to the plane formed by the two counterweight guides (4a, 4b), and wherein each of the counterweight guides (4a, 4b) is respectively located on opposite sides of the plane formed by the car guides (3a, 3b), • at least one drive and suspension element linked to the counterweight through a deflection pulley and to the car by means of deflection pulleys (6a, 6b) located below the car, • a drive unit, located in the upper part of the shaft above the path of the counterweight, • a traction sheave, driven by the drive unit, which transmits the movement to the car and to the counterweight by means of the drive and suspension element, and • a base (10, 10') supporting the drive unit, the horizontal plane passing through the upper ends of the counterweight guides (4a, 4b), the shaft ceiling, the side wall of the shaft closest to the counterweight, a second vertical plane (V2, V2') coinciding with the plane of the side wall of the car closest to the counterweight or with a plane (V2') parallel to the latter which goes into the car a few millimeters, and the front or rear walls of the shaft, the drive unit consists of an engine, without a speed reducer, and in that the control unit of the elevator is in said second parallelepiped space (P'), and in that the base (10, 10') is supported and attached on one of the counterweight guides and on the car guide closest to the counterweight, and in that said base (10, 10') has a maximum length L B in millimeters fulfilling the ratio: L B ≤ L FH / 2 + K where L FH is the length in millimeters of the side wall of the shaft and K is the distance in millimeters between the middle plane of the traction sheave and the vertical plane formed by the two car guides (3a, 3b), wherein K is a constant value comprised between 50 and 1500.