Abstract: A smoke purifier apparatus for chimneys and the like, comprising an intake, a suction chamber for additional air, a combustion chamber located downstream of the intake and the suction chamber, an igniter member arranged within the combustion chamber and including a thermic element heated to a high temperature, and an outlet connection extending downstream of the combustion chamber, wherein the intake and the combustion chamber are so shaped as to form in their whole a venturi tube whose throat section is located at the transition between the intake and the combustion chamber, and the air suction chamber is located in the intake center, it communicates with the surrounding ambient through ducts traversing the intake, and it leads to the throat section of the venturi tube formed by the intake and the combustion chamber.