Low temperature plasma treatment with different treatment times (0, 1, 3, 5 and 10 minute) was used to study the detergency of PET fabrics. Plasma treated and untreated fabrics were soiled with three different soils of carbon black mixed with oily soils, hemoglobin and triolein, and washed by using Terg-O-Tometer at 4$0^{circ}C$ with 40 rpm. In order to assess degree of soil removal of the three soils, following analysis was carried out to each soils on the fabrics : surface reflectance was measured to evaluate the carbon black mixed oily soil, copper-Folin method was used to quantify the amount of remaining hemoglobin, and radiotracer method was applied to measure the triolein. The deposition behavior of carbon black on plasma treated/untreated PET fabrics has been also investigated in the presence of anionic (AS, AOS) or nonionic (AE) surfactant.