Abstarct: Drought stress is one of the most important causes of yield loss in Crop plants. Among the Crop plants, Legumes, especially chickpea, play an important role in providing foods for human. In this regard, a field research consisting the factorial arrangement of factors baxsed on randomized complete block design with three replications was conducted in research farm of Shahrood University to evaluate the effect ultrasonic waves and drought stress on chickpea in 2013. Factors were three levels of drought stress: control (full irrigation), no irrigation at grain dough stage onward and no irrigation in flowering stage onward As the first factor, and ultrasonic waves, with a wavelength of 42 kHz, in the five levels of control (no irradiation), 2, 4, 6 and 8 minutes exposure As for the second factor. Results showed that drought stress negatively affected dry matter, leaf area, plant height, number of primary and secondary sub branch, seed yield, seed weight, number of pods per plant, seeds per pod, pod dry weight, biological yield and harvest index decreased. The most negative impact of stress in the flowering stage onwards. Drought stress after the dough stage of grain increased seed protein and oil contents. Drought stress after the flowering stage increased chlorophyll content. The application of ultrasonic wave increased dry weight of leaves, stems and shoots and also leaf area measured before imposing stress. Ultrasonic waves positively affected plant height, number of primary and secondary branches, seed yield, seed weight, number of pods per plant, pod weight, biological yield, grain protein content and chlorophyll content. The best performance in this test was obtained by treating 6-minute ultrasonic waves. Interactive effects of drought stress and ultrasonic waves were significant on biological yield, number of secondary branches, number of pods per plant, pod dry weight and chlorophyll. As a general conclusion it can be said that the use of ultrasonic waves as seed priming in this study was achieved acceptable results.