Lighting device (1) for a vehicle including a cup-shaped housing body (2) having a front inlet opening (3, at least one lighting module (5,6) arranged inside the housing body spaced apart from the inlet opening (3), and an aesthetic mask (7) to cover a gap between the inlet opening and the light module; wherein the aesthetic mask (7) is delimited by an upper surface (8) facing towards the at leastone lighting module (5,6) and formed by a plurality of individual surface portions (9,10) arranged adjacent to one another; at least part of the individual surface portions (9) being bulged upwards and delimited by at least one continuous complex curved surface (11) defined by the convolution of a first and a second spline curve (12,13) and generated by the translation of the second spline curve(13) along the first spline curve (12) or vice-versa.