The article considers the mammal biodiversity of Shahdag National Park of Azerbaijan. The park was established in 2006. It is situated in the north part of the country, on the southern slope of Greater Caucasus and close to the border with Georgia and Russia. The whole territory of the park is reached 130, 508.1 ha (1305.081 km²). It is the largest national park of the country for its territory and composition of the flora and fauna. It is located on the territory of six districts of Azerbaijan: Ismailli, Guba, Gusar, Gabala, Oguz and Shamakhi. 51 of 101 species of mammals inhabiting Azerbaijan can be found in the park and 18 of them are included in the Red Book of the Republic.