Tire manufacturers face many challenges in optimizing the performance characteristics of tires due to the growing demand from vehicle manufacturers, constantly changing strict regulatory standards, and transportation requirements. Fillers based on clay minerals are increasingly being used in polymer materials nowadays. The advantage of using clay minerals as fillers is their relatively low cost, availability, specific surface area, and ability to improve many properties of polymers, such as mechanical strength, wear and degradation resistance, etc. Another advantage is the reduction of the amount of used carbon black and therefore the amount of waste, which is problematic from an environmental point of view because it contains many harmful substances that have a negative impact on the environment. Therefore, various ways are currently being sought to reduce carbon black emissions into the air and minimize their negative impacts. The use of clay fillers can be a useful step towards making polymer material production more environmentally friendly while also reducing the cost of the resulting product while maintaining its qualitative properties. These properties can be further improved by surface treated of the minerals, creating new opportunities to produce composites with even better properties. In recent years, plasma treated has gained increasing attention as an effective technique for treating the surface of various materials. In this study, we treated surface bentonite using plasma, which is used as a filler in rubber matrix polymer materials. The characterization of treated fillers was studied using X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC). Treated fillers were incorporated into rubber compounds as a partial replacement for the conventional filler. The impact of treated fillers on the curing parameters and mechanical properties of the prepared rubber blends has been investigated. This work was supported by the project KEGA 001TnUAD-4/2022.