Although the extraction of third molars is a daily practice in Oral and Maxillofacial Surgeons, clinics, there are many complications which may occur during or after surgery. These complications were classified in this study in to ١٩ categories. The percentages of many complications, occuring in the Syrian Arab Republic were comparatively different from the percentages published in the international literatures. The factors which can reduce the incidence of complications, are identified and efficient ways of avoiding such complications are recommended .