In this research polyimide, Matrimid 5218, hollow fiber membrane was used to recover sulfur hexafluoride(SF6) which is one of the six greenhouse gases from N2/SF6 mixture gas. Fibers were spun from using dry-wet phase inversion method. The module was manufactured by fabricating fibers after surface coating with silicone elastomer. The scanning electron microscopy(SEM) studies showed that the produced fibers typically had an asymmetric structure; a dense top layer supported by a sponge-like substructure. The developed module had a permeance of 0.78-1.36 GPU for N2 with N2/SF6 selectivity of 2.44-5.08 at various pressure and temperature. For recovery of SF6, a membrane module and 10 vol.% SF6 from N2/SF6 mixture gas was used. The effects of various operating condition such as pressure, temperature, and retentate side flow rate were tested. When pressure and temperature were increased and retentate flow rate was decreased, the SF6 purity in recovered gas was increased up to 37.5 vol.% with decreasing recovery ratio. When retentate flow rate was increased pressure and temperature was decreased, the SF6 recovery ratio in retentate side was increased up to 89% with decreasing the SF6 purity in retentate side.