In an aerosol separator for removing dust particle and droplet aerosols from a flow of contaminated gases, comprising an essentially vertical channel section through which the contaminated gas (exhaust gas) is conducted upwardly, and into which an easily vaporizable liquid is sprayed, in finely divided droplets, a densely packed tube bundle of essentially identical straight tubes consisting of a process-suitable inert material is arranged supported on a perforated conical support structure such that moisture contained in the gas flow is deposited on the inner and outer tube surfaces and flows downwardly counter to the gas flow through the tube bundle and is collected in a gutter mounted to the inner wall of the tube bundle at the bottom end thereof for conducting the condensed liquid together with the contamination of the gas out of the aerosol separator.