Background: Aging impairs the central nervous system capability to process vestibular, visual and proprioceptive signals responsible for maintaining body balance. Total hip replacement (THR) is a procedure, which can improve the quality of life in osteoarthritic patients. However, dynamic stability deficits and impairment in lower limb can be observed for several months after the procedure. Purposes: to investigate the effect of dynamic balance training and traditional rehabilitation on hip musculature moments, and stability index in unilateral total hip arthroplasty programming. Methods: Twenty unilateral total hip arthroplasty patients aged from 55-75 years of both sexes, randomly divided into two groups, selected from Deraya University outpatient clinic. Group (A) (n=10) received traditional rehabilitation program only in form of therapeutic exercise, transfer training and gait training. Group (B) (n=10) received dynamic balance training program in addition to traditional rehabilitation programme. The subjects with unilateral THR were assessed at the beginning and at the 6th & 12th week post operatively after administering the rehabilitation programme in both groups using the following outcome measures: overall stability index, hip extension, abduction, and external rotation moments. Results: The results showed a significant improvement in dynamic balance in group (B) compared with those in group (A). There was no statistical significant difference between the group (A) and group (B) in the mean moments of hip extension, abduction, external rotation in mid stance at the initial, 6 weeks, and 12 weeks intervals except the external rotation at 6 weeks (p<0.05) Conclusion: Dynamic balance training is an effective method of programming unilateral total hip arthroplasty patients.