In this study, some mechanical properties of Istranca oak (Quercus hartwissiana Stev.) wood were investigated. For this purpose, samples were prepared from 5 trees from the Macara region, Demirköy district, and studied for its mechanical properties. According to the tests results, the compression strength parallel to grain was 65.3 $N/mm^2$, the static quality value 8.9, the bending strength 107.6 $N/mm^2$, the modulus of elasticity in bending 11056.1 $N/mm^2$, the impact bending strength 7.8 $J/cm^2$, the dynamic quality value 1.54, the shearing strength 8.7 $N/mm^2$. The Janka hardness parallel to grain and perpendicular to grain were 78 $N/mm^2$ and 56.6 $N/mm^2$, respectively.