Abstract: A muffler purifying device for combustion gases of general application including an expanded external casing having anterior and posterior end intakes equipped with nozzles, one connected to the exhaust pipe and the other for discharging gases, between which is included a unit of elements for retaining impurities and purifying the gases in the form of a cartridge which is removable from the external casing through an aperture located at the posterior end, equipped with a removable cover. The removable cartridge has a tubular wall with its own anterior end intake having an aperture defining an internal nozzle into which the exhaust pipe extends.