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The purpose of the present study was to examine the role of motivation on the rate of participation elders in sport for all. The research methodology was correlative descriptive and was done by field study. The population was all male and female elders of Ahwaz; the number of whom was 49.558 based on 1385 census. The sample was chosen randomly 380 individuals. Measurement tools were individual characteristics questionnaire, and adjusted sports participation motivation questionnaire including 35 questions in the form of 6 small scales. Validity was calculated as kmo = 91% by sampling adequacy and reliability was calculated as 93% by chronbach's alpha. Data analysis was carried out by using descriptive and inferential statistics. The results showed that the most physical activities of elders were 1- 2 hours per week. Also, e enjoys and vitality for men and joy and health and fitness for women were the most important motivates for sport participation. There was a significant relationship between incentives for prevention and treatment, mental health and health and fitness and participation in communal sport. The results of multiple regressions showed that only health and fitness variable can predict participation rate in communal sport.