Window frame for a vehicle, comprising: - a stiffening frame component, and - an inner retaining frame component coupleable to the stiffening frame component for receiving at least a portion of a window, wherein the stiffening frame component comprises a profile with a support portion and an inner flange extending perpendicularly thereto, wherein the inner flange forms an inner edge of the stiffening frame component and the support portion forms a support surface extending radially outwardly from the inner edge for resting on an edge surface of a window opening, wherein the inner retaining frame component comprises a profile with a coupling portion and a connecting portion, wherein the coupling portion is formed to be fitted onto the inner flange of the stiffening frame component, wherein the connecting portion forms a surface for overlapping with the edge surface of the window opening and comprises, at a radially inner boundary thereof, a projection facing away from the coupling portion and the support portion for surrounding the window opening at its radially inner side, characterized in that the coupling portion comprises a recess, wherein a profile of the inner flange comprises at least one outwardly extending rectilinear portion which is insertable into the recess, and the recess is formed as an intermediate space between two portions, extending parallel to each other, of a flanged edge of the inner retaining frame component. - a stiffening frame component, and - an inner retaining frame component coupleable to the stiffening frame component for receiving at least a portion of a window, wherein the stiffening frame component comprises a profile with a support portion and an inner flange extending perpendicularly thereto, wherein the inner flange forms an inner edge of the stiffening frame component and the support portion forms a support surface extending radially outwardly from the inner edge for resting on an edge surface of a window opening, wherein the inner retaining frame component comprises a profile with a coupling portion and a connecting portion, wherein the coupling portion is formed to be fitted onto the inner flange of the stiffening frame component, wherein the connecting portion forms a surface for overlapping with the edge surface of the window opening and comprises, at a radially inner boundary thereof, a projection facing away from the coupling portion and the support portion for surrounding the window opening at its radially inner side, wherein the stiffening frame component comprises a profile with a support portion and an inner flange extending perpendicularly thereto, wherein the inner flange forms an inner edge of the stiffening frame component and the support portion forms a support surface extending radially outwardly from the inner edge for resting on an edge surface of a window opening, wherein the inner retaining frame component comprises a profile with a coupling portion and a connecting portion, wherein the coupling portion is formed to be fitted onto the inner flange of the stiffening frame component, wherein the connecting portion forms a surface for overlapping with the edge surface of the window opening and comprises, at a radially inner boundary thereof, a projection facing away from the coupling portion and the support portion for surrounding the window opening at its radially inner side, the coupling portion comprises a recess, wherein a profile of the inner flange comprises at least one outwardly extending rectilinear portion which is insertable into the recess, and the recess is formed as an intermediate space between two portions, extending parallel to each other, of a flanged edge of the inner retaining frame component.