A lighting device for vehicle headlamps, comprising: - at least one light source, - a light guide comprising an end section with a light entry surface, wherein the light guide is assigned to the at least one light source for guiding light which is emitted by the at least one light source and coupled into the light guide at the light entry surface, - a light guide adapter configured to secure the end section of the light guide and to hold the light entry surface in a position with regard to the at least one light source, the light guide adapter comprises a base-section and a securing-section, and - a support frame, on which the light guide adapter is mounted, wherein the securing-section of the light guide adapter comprises at least one first engaging-element, the base-section comprises at least one first fastening-opening, the support frame comprises a mounting-opening for the securing-section and a second fastening-opening, wherein the mounting-opening having at least one second engaging-element corresponding to the at least one first engaging-element of the securing-section, wherein the light guide adapter can be brought into an end position by inserting the securing-section into the mounting-opening, such that the at least one first engaging-element engages with the at least one second engaging-element, wherein the at least one first fastening-opening and the at least one second fastening-opening are overlapped, so that the first and second fastening-opening (311, 411) can receive a fastening-element, wherein the at least one first engaging-element is built as first locking-element protruding transversely to a longitudinal axis of the securing-section, wherein the at least one second engaging-element is built as a recess corresponding to the at least one first locking-element, characterized in that the light guide adapter can be brought into an intermediate position by inserting the securing-section into the mounting-opening, such that the at least one first locking-element passes through the at least one recess and the base-section abuts on a portion of the support frame, which surrounds the mounting-opening, and wherein the light guide adapter can be brought into an end position by rotating the light guide adapter starting from the intermediate position around the longitudinal axis of the securing-section, such that the at least one first fastening-opening and the at least one second fastening-opening are overlapped, so that the first and second fastening-opening (311, 411) can receive a fastening-element. - at least one light source, - a light guide comprising an end section with a light entry surface, wherein the light guide is assigned to the at least one light source for guiding light which is emitted by the at least one light source and coupled into the light guide at the light entry surface, - a light guide adapter configured to secure the end section of the light guide and to hold the light entry surface in a position with regard to the at least one light source, the light guide adapter comprises a base-section and a securing-section, and - a support frame, on which the light guide adapter is mounted, the securing-section of the light guide adapter comprises at least one first engaging-element, the base-section comprises at least one first fastening-opening, the support frame comprises a mounting-opening for the securing-section and a second fastening-opening, wherein the mounting-opening having at least one second engaging-element corresponding to the at least one first engaging-element of the securing-section, wherein the light guide adapter can be brought into an end position by inserting the securing-section into the mounting-opening, such that the at least one first engaging-element engages with the at least one second engaging-element, wherein the at least one first fastening-opening and the at least one second fastening-opening are overlapped, so that the first and second fastening-opening (311, 411) can receive a fastening-element, wherein the at least one first engaging-element is built as first locking-element protruding transversely to a longitudinal axis of the securing-section, wherein the at least one second engaging-element is built as a recess corresponding to the at least one first locking-element, characterized in that the light guide adapter can be brought into an intermediate position by inserting the securing-section into the mounting-opening, such that the at least one first locking-element passes through the at least one recess and the base-section abuts on a portion of the support frame, which surrounds the mounting-opening, and wherein the light guide adapter can be brought into an end position by rotating the light guide adapter starting from the intermediate position around the longitudinal axis of the securing-section, such that the at least one first fastening-opening and the at least one second fastening-opening are overlapped, so that the first and second fastening-opening (311, 411) can receive a fastening-element.