A filter element for a liquid filter, especially a fuel filter, having an annular, rotationally symmetrical filter medium closed on at least one axial end by an end disk to sealingly separate an exterior space surrounding the the filter medium from an interior space inside the filter medium, with a connecting opening provided in the end disk such that the opening is arranged excentrically of the axis of the filter medium, and a filter system in which such a filter element is disposed.