A particulate filter for a gasoline internal combustion engine, comprising: - a structure of porous ceramic material, having a conformation elongated in a main direction, and defining a plurality of parallel channels extending from an upstream end to a downstream end of said structure of porous ceramic material, with reference to a direction of a flow of exhaust gases through said filter, - said channels comprising first channels only closed at their upstream end and second channels only closed at their downstream end, so as to force the flow of exhaust gases entering the filter to pass from one channel to at least one other channel in order to leave the filter, flowing through the pores of the ceramic material wall defining each channel, and - a coating of catalyst material applied to said structure of ceramic material, - wherein the structure of porous ceramic material has a nominal porosity of less than 50% and an average pore size of less than 15 microns, - said coating of catalyst material is only present on an upstream portion of said ceramic material structure adjacent to said upstream end, and extending in said main direction for a length of not less than 10 mm and not greater than 80% of the overall length of said structure of porous ceramic material, - in such a way that in said upstream portion of the ceramic material structure the coating of catalyst material covers both said first channels and said second channels, while in the remaining portion of the ceramic material structure, the coating of catalyst material is absent from both said first channels and from said second channels, and - in that the ratio between the amount by weight of catalyst material and the volume of the filter is less than 61 g/liter. - a structure of porous ceramic material, having a conformation elongated in a main direction, and defining a plurality of parallel channels extending from an upstream end to a downstream end of said structure of porous ceramic material, with reference to a direction of a flow of exhaust gases through said filter, - said channels comprising first channels only closed at their upstream end and second channels only closed at their downstream end, so as to force the flow of exhaust gases entering the filter to pass from one channel to at least one other channel in order to leave the filter, flowing through the pores of the ceramic material wall defining each channel, and - a coating of catalyst material applied to said structure of ceramic material, - wherein the structure of porous ceramic material has a nominal porosity of less than 50% and an average pore size of less than 15 microns, - said coating of catalyst material is only present on an upstream portion of said ceramic material structure adjacent to said upstream end, and extending in said main direction for a length of not less than 10 mm and not greater than 80% of the overall length of said structure of porous ceramic material, - in such a way that in said upstream portion of the ceramic material structure the coating of catalyst material covers both said first channels and said second channels, while in the remaining portion of the ceramic material structure, the coating of catalyst material is absent from both said first channels and from said second channels, and - in that the ratio between the amount by weight of catalyst material and the volume of the filter is less than 61 g/liter.