Te purpose of research was identifying the relationship between achievement motivation and efficiency of agricultural faculty staff, Islamic Azad University Shoushtar Branch. The method of research was a descriptive-correlative. The sample size was agricultural faculty staff (n=45). A five-point Likert-type scale was used as the instrument to gather data in order to measure the achievement motivation. A quantitative analysis using data gathered by the survey questionnaire and Likert scale was used. Data were analyzed using the Statistical Package for the Social Sciences (SPSS).Questionnaire reliability was estimated by calculating Cronbach’s alpha and it was appropriate for this study (Mean Cranach's alpha 0.82). Te result of research revealed that the correlation between achievement motivation, responsibility adoption, activity rate, goal oriented and efficiency of staff at the level of 0.05 was significant. Liner regression was used to predict changes in efficiency by different variables. Based on the results achievement motivation, activity rate, responsibility adoption and goal oriented may well explain for 33.8% changes (R2 = 0.338) in efficiency of staff.