Fuel filter for diesel engine

A fuel filter for diesel engines is disclosed. The disclosed fuel filter for diesel engines is ⅰ) and a top cover constituting a flow passage of the diesel fuel, is attached integrally to the vehicle body ⅱ), is coupled with the top cover a central portion of the housing and, ⅲ) filter assembly incorporating the filter assembly through, and is disposed between the upper cover and the filter assembly, comprising: a body that make up the top cover and the heater assembly and a moisture sensor integrated, heater assembly is selectively be operated in accordance with the detection signal of the fuel temperature sensor provided in the engine body can.