Knitted wool fabrics were treated with argon and air atmospheric plasma. Pilling, bursting strength, thermal resistance, thermal conductivity, air permeability, water vapor permeability and friction properties were investigated. The surfaces of untreated and plasma-treated wool fabrics were analyzed by scanning electron microscopy to compare the morphological changes. The outcomes showed that atmospheric plasma treatments affected the physical properties of wool fabrics such as thermal properties, water vapor permeability, air permeability and friction properties. While there was an increase in thermal resistance, water vapor permeability and friction properties; pilling tendency, bursting strength, thermal conductivity and air permeability values decreased.