The aim of this study was to evaluate the possible anti-inflammatory effect of 940nm diode laser in treating carrageenan induced arthritis in temporomandibular joint in Wistar albino rats, using different energy density of LLLT, by clinical assessment of the inflammation. it was concluded that 74J/cm2 LLLT had very efficient in edema reduction and restore function with good anti-inflammatory effect, on the other hand 171J/cm2 had appear to be in or near the borderline between non-thermal and thermal lasers eradiation in considering to Westar rat skin.