Roller blind system for a motor vehicle, in particular for shading a rear window of the motor vehicle, with - a flexible fabric sheet provided that can be moved between a stowed condition and a functioning condition in a pull-out direction, - a pull-out profile provided at a distal end of the fabric sheet, and - two guide rails that are located at both sides of the fabric sheet when it is in its functioning condition, and which run, at least in part, not parallel to one another, wherein - the pull-out profile incorporates at its ends two sliding sections opposite one another, each of which is in engagement with a guide rail, - the pull-out profile incorporates a covering face (46a, 46b) that is directed in the pull-out direction when in the stowed condition and which serves to cover an outlet slot for the fabric sheet, and - the pull-out profile is constructed so as to be variable in length, for which purpose it comprises a main segment connected to the distal end of the fabric sheet and two end segments that are able to move with respect to the main segment in a direction orthogonal to the pull-out direction by means of a guide, wherein the covering face (46a, 46b) comprises a main section on the main segment and side sections on the end segments, wherein the side sections of the covering face (46a, 46b) enter into a receiving pocket enclosed by the main segment when the length of the pull-out profile is reduced, characterized in that the guides (44c, 44e, 42c) by means of which the end segments are guided with respect to the main segment are configured separate from the side sections in such a way that the side sections of the covering face (46a, 46b) do not come into physical contact with the main segment during inserting into the receiving pocket. - a flexible fabric sheet provided that can be moved between a stowed condition and a functioning condition in a pull-out direction, - a pull-out profile provided at a distal end of the fabric sheet, and - two guide rails that are located at both sides of the fabric sheet when it is in its functioning condition, and which run, at least in part, not parallel to one another, wherein - the pull-out profile incorporates at its ends two sliding sections opposite one another, each of which is in engagement with a guide rail, - the pull-out profile incorporates a covering face (46a, 46b) that is directed in the pull-out direction when in the stowed condition and which serves to cover an outlet slot for the fabric sheet, and - the pull-out profile is constructed so as to be variable in length, for which purpose it comprises a main segment connected to the distal end of the fabric sheet and two end segments that are able to move with respect to the main segment in a direction orthogonal to the pull-out direction by means of a guide, wherein the covering face (46a, 46b) comprises a main section on the main segment and side sections on the end segments, wherein the side sections of the covering face (46a, 46b) enter into a receiving pocket enclosed by the main segment when the length of the pull-out profile is reduced, characterized in that the guides (44c, 44e, 42c) by means of which the end segments are guided with respect to the main segment are configured separate from the side sections in such a way that the side sections of the covering face (46a, 46b) do not come into physical contact with the main segment during inserting into the receiving pocket.