This is a randomized clinical study. The research community, are elderly persons who are members of “JAHAN DIDEGAN association” in 6th Area of Tehran during 1395-1396.For doing that, at first, researcher will refer to mentioned association to invite members for cooperation. Researcher will choose 60 persons who are qualified among volunteers. Qualification factors are age between 60-80years, not history and lack of acute or chronic debilitating diseases, Psychotic or mental illness, problems that lead to ban exercise such as history of Arthroplasty surgery in the lower limbs, fracture, severe deformity in organs, hard arthritis, mental problems, balance disorders and finally catching score in body balance tests. The first evaluation in this research will achievable by using tools before randomized allocation. At the end of first evaluation, participants according to quad random block will divide into 2 groups, control and intervention. Intervention participants under the supervision of coach and researcher will participate in Tai Chi Chuan exercise program during 8 weeks and 2 sessions per week in 45 min. at the end of 16 sessions again research tools will be completed by elderly members of both groups.