Some chemical properties were determined in completely ripe fruits and fully developed leaves of black mulberry (Morus nigra L.) genotypes, grown in Mahmatlar, Turkey. Crude protein was found as the most abundant component in both fruits (10.25 %) and leaves (25.72 %). Native black mulberry fruits had higher content of total sugar (6.25 %), crude fat (5.75 %) and crude protein than those of the other berries. Analyses of mineral composition (K, Na, P, Ca, Mg, Zn, Fe, Mn and Cu) results indicated that K was the main mineral of fruit followed by Na and P. Furthermore, black mulberry leaves were rich in sodium, calcium and potassium. Black mulberry should be more widely used because of its potential nutrient contribution for human and also for feeding animals.