Abstract: Back-vision system for vehicles which comprises a microcamera (6) with its corresponding control unit (13) and power-supply source, a housing for the microcamera (6), formed by an external casing (1) and an internal box (2) joined to the external casing (1) and in communication with it, into which the microcamera (6) is introduced, the objective of which microcamera is focused towards the outside through an opening in the external casing (1), and a monitor (21) on which the images picked up by the microcamera (6) can be seen. By placing a microcamera (6) in its corresponding housing in a suitable manner on one of the sides of the vehicle and, optionally one microcamera and its housing on each side, improved back-vision is obtained.