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, mounted on said at least one support and electrically connected to at least said power supply means, said at least one light source being intended, in use, to emit at least one beam of visible light towards the ground, at least at one front stepping point to which the person has to move the foot, in order to move forward along an ambulation direction; - at least sensor means intended to detect at least one control parameter (p c) identifying the ambulation condition; - at least one processing unit operatively connected to said at least power supply means, said at least one light source and said at least sensor means and intended to control the activation-deactivation of said at least one light source (as a function of said at least one control parameter (p c), corresponding to an angle or to a displacement measurement related to the instant position of at least one part of the body wearing the device, during ambulation, wherein said device comprises at least one member in charge of measuring and optionally saving and/or transmitting the linear or the angular variation of the position of at least a part of the body of the person to which the said assistance to the ambulation makes reference, wherein said at least one control parameter is determined at least at one time instant and at least as a function of said at least one measuring member of the linear and/or angular variation of the position of at least one part of the body of the person to whom the said assistance to the ambulation refers, characterized in that said at least one member for measuring the linear and/or angular variations of the position determines the variation of the position by analyzing the propagation in space of signals having predetermined waveforms optionally selected from pulse sequences of variable frequency and/or variable time duration and/or sine waves of known frequency. - 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, mounted on said at least one support and electrically connected to at least said power supply means, said at least one light source being intended, in use, to emit at least one beam of visible light towards the ground, at least at one front stepping point to which the person has to move the foot, in order to move forward along an ambulation direction; - at least sensor means intended to detect at least one control parameter (p c) identifying the ambulation condition; - at least one processing unit operatively connected to said at least power supply means, said at least one light source and said at least sensor means and intended to control the activation-deactivation of said at least one light source (as a function of said at least one control parameter (p c), corresponding to an angle or to a displacement measurement related to the instant position of at least one part of the body wearing the device, during ambulation, wherein said device comprises at least one member in charge of measuring and optionally saving and/or transmitting the linear or the angular variation of the position of at least a part of the body of the person to which the said assistance to the ambulation makes reference, wherein said at least one control parameter is determined at least at one time instant and at least as a function of said at least one measuring member of the linear and/or angular variation of the position of at least one part of the body of the person to whom the said assistance to the ambulation refers, characterized in that said at least one member for measuring the linear and/or angular variations of the position determines the variation of the position by analyzing the propagation in space of signals having predetermined waveforms optionally selected from pulse sequences of variable frequency and/or variable time duration and/or sine waves of known frequency.