The properties of cotton fabrics after plasma sputtering treatment were investigated. Argon, nitrogen and oxygen were used as the working gases in the system, and the results were compared. The direct dye was used for the dyeing. Chemical composition of the treated cotton surface specimens was evaluated with Fourier transform infrared spectroscopy (FTIR). The results of wettability tests revealed that the atmospheric plasma treatment significantly improved hydrophilicity of cotton fiber. Such improvement greatly enhanced the effectiveness of dyeing processes. The results showed changed in the mechanical properties and the chemical composition of cotton fabric surface after plasma treatment and differed according to the gas used.