Fuel filter for cleaning fuel for an internal combustion engine, - with a main filter and a prefilter arranged upstream of the main filter, through which the fuel can flow successively, - wherein the prefilter has a water separator for separating water present in the fuel, which water separator comprises a water collection chamber for collecting the separated water, - wherein the water separator has a separator housing, which delimits a prefilter housing inner chamber through which the fuel can flow, - wherein the water collection chamber of the water separator is formed by a lower region of the prefilter housing inner chamber relative to the direction of gravitational force, wherein in the lower region of the water collection chamber a water outlet is provided, - wherein the main filter has a filter housing, in which a filter element is arranged, which divides a main filter housing inner chamber delimited by the filter housing into a dirty side and a clean side, - wherein in the clean side a fuel outlet is provided for channeling the cleaned fuel out of the fuel filter into the internal combustion engine, - wherein the fuel filter comprises a suction jet pump connected fluidically to the water collection chamber for removing fuel and/or water from the water collection chamber, - on the main filter a fuel output is provided, which communicates fluidically with the suction jet pump, so that the fuel flowing through the fuel output acts as a propellant for the suction jet pump, wherein the fuel output of the main filter to the suction jet pump comes from the dirty side, and the same channel is also used for venting the fuel filter towards the tank, - wherein the prefilter is connected fluidically to the main filter via a conveying apparatus which conveys the fuel from the prefilter to the main filter and builds up overpressure there, characterized in that - in the prefilter housing inner chamber a hydrophobic membrane through which the fuel can flow is arranged for separating the water contained in the fuel, - in the water collection chamber a water outlet to the suction jet pump is configured as an overflow which delimits the filling level of water in the water collection chamber. - with a main filter and a prefilter arranged upstream of the main filter, through which the fuel can flow successively, - wherein the prefilter has a water separator for separating water present in the fuel, which water separator comprises a water collection chamber for collecting the separated water, - wherein the water separator has a separator housing, which delimits a prefilter housing inner chamber through which the fuel can flow, - wherein the water collection chamber of the water separator is formed by a lower region of the prefilter housing inner chamber relative to the direction of gravitational force, wherein in the lower region of the water collection chamber a water outlet is provided, - wherein the main filter has a filter housing, in which a filter element is arranged, which divides a main filter housing inner chamber delimited by the filter housing into a dirty side and a clean side, - wherein in the clean side a fuel outlet is provided for channeling the cleaned fuel out of the fuel filter into the internal combustion engine, - wherein the fuel filter comprises a suction jet pump connected fluidically to the water collection chamber for removing fuel and/or water from the water collection chamber, - on the main filter a fuel output is provided, which communicates fluidically with the suction jet pump, so that the fuel flowing through the fuel output acts as a propellant for the suction jet pump, wherein the fuel output of the main filter to the suction jet pump comes from the dirty side, and the same channel is also used for venting the fuel filter towards the tank, - wherein the prefilter is connected fluidically to the main filter via a conveying apparatus which conveys the fuel from the prefilter to the main filter and builds up overpressure there, - in the prefilter housing inner chamber a hydrophobic membrane through which the fuel can flow is arranged for separating the water contained in the fuel, - in the water collection chamber a water outlet to the suction jet pump is configured as an overflow which delimits the filling level of water in the water collection chamber.