A cartridge containing one serving of coffee powder for preparing a coffee beverage comprises a cartridge body having a cup-like shaped lower portion and a cover portion; the cup-like shaped lower portion having a bottom portion and a upper region; and a lower filter element located inside the cup-like shaped lower portion between the coffee powder and the bottom portion; in which the interior of the cup-like shaped lower portion of the cartridge is provided with engaging means, and in which the lower filter element is provided with a peripheral edge portion engaging the engaging means for clampingly fix the lower filter element to the cup-like shaped lower portion of the cartridge. In the preferred embodiments the engaging means are constituted by a groove provided in the interior or the exterior of the cup-shaped lower portion.