In our study, a modified technique of medial patellar desmotomy in donkey was performed on 10 apparently adult healthy alive donkeys of both sexes in addition to other two cadavers. In concern to the upward fixation of the patella in donkeys as native animals in Upper Egypt which recorded high incidence of the disease more than found in northern areas. Medial patel- lar desmotomy is the preferable sur- gical procedure of choice for treating such problem. Contrary to the stand- ard technique of treatment, the study aimed to introduce a modified easier, less expensive and field applicable desmotomy method. Our study gives a full detailed applied anatomical description of the patellar ligaments specially the medial one as well as its boundaries; osseous and muscular attachment as well as the extension of the joint capsule. The medial patellar ligament was the longest and the weakest among others on the other hand the middle one was the shortest and of considerable thickness. The best and ideal side for desmotomy was determined in order to avoid massive drawbacks as piercing the joint cap- sule or even cutting the tendon of the sartorius muscle. Generally nearly similar anatomical results were ob- served with the most of authors and the donkey was an ideal animal in equine experiment and the study al- low the anatomists for further com- parative anatomical researches.