Ambulation assistance wearable device, comprising: - at least one support, intended to be removably attached to the body of a person in a respective attachment position; - at least power supply means, anchored to said at least one support; - at least one light source (4, 41, 42), mounted on said at least one support and electrically connected to at least said power supply means, said at least one light source (4, 41, 42) being intended, in use, to emit at least one beam of visible light (5, 51, 52) towards the ground, at least at one front stepping point (6, 61, 62) to which the person has to move the foot, in order to move forward along an ambulation direction (x-x); - at least sensor means intended to detect at least one control parameter (p c) identifying the ambulation condition; - at least one processing unit, intended to control the activation-deactivation of said at least one light source (4, 41, 42) as a function of said at least one control parameter (p c), operatively connected to said at least power supply means, said at least one light source (4, 41, 42) and said at least sensor means; characterized in that said at least one control parameter (p c) corresponds to an angle or to a displacement measurement related to the instant position of at least one part of the body of said person, during ambulation and wherein said light source is mounted on a movable support in order to change at least the orientation of the propagation axis of the light beam and/or the position of said light source; said movable support being dynamically connected to the shaft of at least one motor and said motor being operated by a control unit; said control unit being designed for receiving measurement signals of the position in the space of said light source or the change of said position and said control unit being designed for generating a signal for operating said motor as a function of said measurement signals of the position of said source, which control signals are adapted to compensate for the changes of the position of said light source i.e. the change of the direction of the propagation axis of the light beam and thus the position of the footprint generated by the same on the incidence plane. - at least one support, intended to be removably attached to the body of a person in a respective attachment position; - at least power supply means, anchored to said at least one support; - at least one light source (4, 41, 42), mounted on said at least one support and electrically connected to at least said power supply means, said at least one light source (4, 41, 42) being intended, in use, to emit at least one beam of visible light (5, 51, 52) towards the ground, at least at one front stepping point (6, 61, 62) to which the person has to move the foot, in order to move forward along an ambulation direction (x-x); - at least sensor means intended to detect at least one control parameter (p c) identifying the ambulation condition; - at least one processing unit, intended to control the activation-deactivation of said at least one light source (4, 41, 42) as a function of said at least one control parameter (p c), operatively connected to said at least power supply means, said at least one light source (4, 41, 42) and said at least sensor means; said at least one control parameter (p c) corresponds to an angle or to a displacement measurement related to the instant position of at least one part of the body of said person, during ambulation and wherein said light source is mounted on a movable support in order to change at least the orientation of the propagation axis of the light beam and/or the position of said light source; said movable support being dynamically connected to the shaft of at least one motor and said motor being operated by a control unit; said control unit being designed for receiving measurement signals of the position in the space of said light source or the change of said position and said control unit being designed for generating a signal for operating said motor as a function of said measurement signals of the position of said source, which control signals are adapted to compensate for the changes of the position of said light source i.e. the change of the direction of the propagation axis of the light beam and thus the position of the footprint generated by the same on the incidence plane.