Copper hydroxide nanowires were synthesized from copper chloride dihydrate and sodium hydroxide in the  presence of Pistachio leaf extract  at room temperature. The results of scanning electron microscopy (SEM)  exhibited  that the copper hydroxide  Cu(OH)2  are nanowires  in shape and having  an average diameter of ca. 10 nm and lengths of up to 500 nm . The Fourier transfor infrared  spectroscopy (FT-IR)  results examined the bioactive functional groups , which acts as dispersing, binding and capping agent for the copper hydroxide nanowires. X-ray diffraction (XRD) spectra confirmed the copper hydroxide nanoparticles crystalline in nature. The current research introduces a new, simple, and rapid route for the in –laboratory synthesis of copper hydroxide nanowires. This facile and green approach may provide a useful tool to large scale synthesis other copper nanoparticles that have potential biotechnology.