To investigate the characteristics of nitrocarburizing for high carbon chromium bearing steel, it was undertaken 4 hours holding at $850^{circ}C$ in the atmosphere containing 60% endothermic gas and 40% ammonia. The microstructure of nitrocarburized surface consists of ${varepsilon}-Fe_{2-3}N$, ${gamma}^{prime}-Fe_4N$, $Fe_3C$ and $Fe_3$(C,N), and the ${varepsilon}$-nitride was rich in the surface-internal part. The nitrocarburized surface contains a larger volume fraction of primary carbonitrides and has more retained austenite and is slightly harder than the interior.