Abstract: An apparatus for cleaning exhaust gases of solid particles comprises a rotational combustion chamber (1), a swirler (2) and a soot collector (3) separated from one another by a separating cavity (7) and located on the same axis downstream the gas flow. A catalytic unit (4) for neutralizing harmful gaseous emissions is arranged coaxially inside the soot collector (3). The apparatus is provided with an inlet pipe (8) and an outlet pipe (9). The swirler is made in the form of an impeller. The unit (4) for neutralizing harmful gaseous emissions is made in the form of a cylindrical body (5) comprising longitudinal channels (6) with a catalytically active internal layer applied-thereto. The longitudinal channels (6) have a curvilinear closed-type shape in their cross-section and the catalytically active layer has the same thickness over the entire internal surface of the longitudinal channels (6), which thickness is uniform both over the cross-section of the unit (4) and throughout its length.