Background: Results of tendon transfer in birth palsy have been evaluated in the USA and Europe, but there is no report on this type of treatment in Iran. The present study discusses the transferring of latissimus dorsi muscle for improvement of shoulder abduction. Materials and Methods: The results of tendon transfer were reviewed in patients with problems of shoulder abduction. They have been evaluated and followed up for about 6 months. Variation of their stage was calculated by sign test and the abduction range of shoulder were evaluated by paired-t test. Results: 22 patients out of 33 cases were evaluated. The mean age was 5.4 ± 3.2 years and 63.6% were females. Before operation 36% of patients were in stage 2 while 64% were in satge 3. After tendon transfer 73% patients were in stage 3 and 23% were in stage 4 (P<0/05). The abduction angle of shoulder increased from 63.5±9.9 (before tendon transfer) upto 109.2±22.7 (after tendon transfer)(P<0/001). Conclusion: As a surgical treatment for birth palsy, latissimus dorsi muscle transfer improved the abduction angle of shoulder with no considerable complications.