The invention relates to a platform lift for accessibility for people in a wheelchair, said lift comprising a device for lifting the platform, comprising two cross-members (1) acting as a guiding rail and secured to the staircase； including two carriages (2) to which a platform (3) is secured, the lifting of the platform (3) being carried out by two electric motors provided with a mechanical reducer (4) and secured to the outside of the two cross-members (1)； the shafts of the motors being provided with a truncated pinion (5) on each end, driving another truncated pinion united with an endless screw (6).
