Purpose: This study was designed to evaluate the effect of pulsed electromagnetic field (PEMF) as a supplementary treatment modality in addition to the utilization of the repositioning splint in management of temporomandibular joint internal derangements.Patients and Methods: 12 TMJs in 12 females and aged 20 to 40 years comprised the study material. The patients' complaints were pain confined to temporomandibular joint (TMJ) and abnormal joint noises during function. Patients were randomly divided into 2 groups in which only anterior repositioning splint was performed in 1 group and repositioning splint plus pulsed electromagnetic field as supplementary treatment modality was performed in the other group (study group). Both groups contained patients with disc displacement with reduction. Clinical evaluation of the patients was done before the procedure, immediately after the procedure, on postoperative day 1, and at 1, 2, 4, 6, 8, 12 weeks postoperatively. Intensity of TMJ pain, jaw function, and clicking sounds in the TMJ were assessed using visual analog scales. Maximal mouth opening , lateral jaw movements, Muscles pain and protrusive movement also were recorded at each follow-up visit.Results: Both techniques increased maximal mouth opening, lateral movements, protrusive movement and function, while reducing TMJ pain and noise, total relieve of pain after first day of use of PEMF have been noticed in the study group .Conclusions: Although patients benefitted from both techniques, anterior repositioning splint with PEMF application seemed to be superior to anterior repositioning splint alone in decrease pain management period.