In this research the effects of therapeutic ultrasound on dermal repair of full thickness skin wound of rabbits-were studied from histological quantitative method point of view. By using experimental design, 26 adult male rabbits were anaesthetized and under sterile conditions 4 incisions (3 cm length) were made on the dorsal skin. Day of surgery was considered as zero. Incisions selected randomly for following treatments: No 1 selected for ultrasound therapy (US). No 2 for treating by ultrasonic gel (G). No 3 for treating by Betadine (B). No 4 were regardedas placebo (P). The features of us were: 1 MHz, Pulsed 2:8, 0.5 watt/cm2 4 min. The treatments were performed once daily. On the 4th, 7th and 15th day corresponding to inflammation, proliferation and remodeling phase of wound healing process some of the rabbits were killed by ether and tissue samples, obtained from them Samples were prepared for routine histological study and were stained by hematoxylin and eosin method. Fibroblasts, macrophages, neutrophils and endothelial cells of blood vessels counted by special eyepiece and thickness of wound bed were calculated by scaled eye piece. Data were analysed using analysis of variance method.On the 4th, 7th and 15th day the number of fibroblasts of P, US and G and US groups were higher than the other groups. On the 7th and 15th day number of endothelial cells of blood vessels of P, and us groups were higher than the other groups. On the 4 th, 7 th, and 15th day thickness of wound bed of G, P, and US groups were higher than other groups. There were no significant statistical difference between variables except the thickness of wound at 15th day showed and LSD method indicated that this difference was between ultrasound and gel groups.According to the present study ultrasound therapy had no positive effect on dermal repair of full thickness skin wound of rabbits from histological quantitative point of view.