A vehicle side-flashing lamp includes: a cup-shaped housing; a light exit opening opposite the housing bottom; and a light exit cover which covers the light exit opening. At least one light-emitting diode emits light outwardly at least partially at an angle which is large with respect to the main axis of the housing. A prismatic element, defined by first, second and third boundary surfaces, is arranged in front of the light-emitting diode in such a way that an emitted light beam passes through the first boundary surface into the prismatic element and is at least partially reflected at the second boundary surface, which is inclined with respect to the central axis of the light beam, in such a way that the reflected part issues from the prismatic element through the third boundary surface.