The object of the present invention is a transfer device (D) for the loading/unloading of a wheelchair (SR) on/from a vehicle (V) comprising a platform (4), whereon said wheelchair (SR) is positioned during the loading and unloading operations, movable at least from a deposit position (P4), in which it is at the level of the ground (S) to an access position (P3), in which it is at the level of the floor (P) always keeping substantially horizontal due to the fact of being indirectly constrained to the vehicle (V) by a kinematic mechanism (2). The platform (4) is provided with a front safety barrier (6 600), rotatable to serve as a ramp (6 600) when the platform (4) is at the level of the ground (S), and side safety barriers (7 700), According to the invention, when the platform (4) is at the level of the ground (S), also the side safety barriers (7 700), each substantially constituted by an articulated quadrilateral (72 702), fold over by suitable kinematic mechanisms (8, 73 600) while corresponding side ramps (71 701) are made available. The advantage of the invention consists in the fact that the loading/unloading of the wheelchair (SR) from/to the ground (S) is allowed from any side of the platform (4) by virtue of the automatic folding of both the front (6 600) and side barriers (7 700) and of the simultaneous presentation of the corresponding ramps (6 600), (71 701).
