Electroneuromyography is important in the diagnosis and differential diagnosis of the entrapment neuropathies as well as in planning and following up surgical procedures. Electroneuromyography provides objective data in determination of affected part of nerves, its severity and localization and time course of the lesions. In this review, after summarizing the basic concepts of sensory and motor conduction studies and needle electromyography examination, electroneuromyography findings in entrapment neuropathies will be discussed.