The statistical analysis of the present study showed that the dietary peppermint leaves at 0.5% up to 2.0% enhanced thebird production status during the late laying period. However, most of the previous studies have been investigated in earlystages. Such as the results of Ocak et al. (2008) and Toghyani et al. (2010) demonstrated that birds given diets containingpeppermint leaves are efficacious in supporting the growth performance of broiler chicks at early stages of life. It wasreported earlier that using 2% blends of ziziphora, menta, peppermint and nettle improved egg mass and feed conversion inlaying hens (Sayedpiran et al., 2011).