Abstract: A fuel filter having a filter housing of an internal combustion engine in which water separated from the fuel may collect within the filter is to permit collection of the largest possible quantity of separated water in the smallest possible overall volume. To this end, such a fuel filter is characterized by the following features: a liquid line (3) leads out of an area of the filter housing that is exposed to fuel and in which separated water can settle out due to gravity into a water collecting chamber (4) situated outside the filter housing, an upper area of the water collecting chamber (4) is connected by a connecting line (5) mounted there to a fuel delivery line (1) of the internal combustion engine.