This study was designed to compare the effects of Transcutaneus Electrical Nerve Stimulation (TENS) and Electrical Muscle Stimulation (EMS) on myofascial trigger point (MTrP) of the upper trapezius muscle. A total of 40 patients were randomly divided into three groups. All patients had active MTrP in one side of the upper trapezius muscles. Group I was treated with TENS and trapezius-stretching exercises; Group II was treated with EMS and trapezius stretching exercises and Group III, the control group, had only trapezius-stretching exercises. Subjective pain intensity with VAS, range of motion (ROM), and pain threshold (PT) were assessed before, immediately after two week treatment and 3 months after treatment.