The new ruthenium complex, [Ru(N-P)2(SCN)2], where N-P = 8-(diphenylphosphino)quinoline, was prepared and characterized by FT-IR, UV-Vis spectrometry and X-ray crystallography. The complex crystallized in the monoclinic system with the space group P1211. The cell parameters are a = 9.9635(7) Å, b = 18.8967(9) Å, c = 11.2651(6) Å, α = γ = 90°, β = 110.474(7) °. The complex has a distorted octahedral structure with cis configuration for the thiocyanate groups. The bond-length analysis indicates the following order of trans-influence: P > N(SCN-) > N(quinolone).