Pure Ni nanopowders were successfully prepared by the anodic arc discharged plasma method with homemade experimental apparatus. The nanoparticles by this process were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and BET adsorption to determine the chemical composition, morphology, crystal structure, specific surface area, particle size and particle size distribution. Element analyze instrument is also used to determine the C, H, N contents. The main constituent elements were examined by energy dispersive X-ray spectroscopy (EDS) equipped in SEM and the structure compose was qualitatively analyzed by FT-IR spectrum. The experimental results showed that the crystal structure of samples was fcc structure same as the bulk material with an average grain size of about 47 nm, ranging from 20 nm to 70 nm. The sample has high purity and strong adsorption, whose particles distributed uniformly in spherical chain shape with a specific surface area of 14.23 m2/g.