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Abstract:  Effect of steel fiber addition on the friction and wear characteristics and mechanical properties of non-asbestos composites brake pad material was investigated. For this purpose, the content of steel fiber structure was added in the range of 0 - 20 wt.% with changing the rock fiber of the matrix structure. The matrix have also  phenolic binder resin, cashew nut shell liquid, aramid pulp, magnetite, rubber and graphite.  Friction behavior of the samples prepared from the mixture were tested using a pin-on-disk type test configuration according to the NF F 11-292 French standard. It was observed that coefficient of friction (CoF) of composite samples increased with increasing steel fiber content. After 5wt.% steel fiber addition, the CoF of composite did not significantly changed. Although the steel fiber addition caused a significant increase in the CoF of the composite, no significant change can be observed in the specific wear rate with steel fiber addition up to 15wt.%, above which it increased significantly. On the other hand, steel fiber addition to the composite matrix deteriorate the mechanical properties, but improved the fade resistance of the sample.