The micro surgery did not take its role correctly in our country in spite of it being well known and widespread throughout the world for a relatively long time. The micro surgery is an essential part in the reconstruction of tissue of skin, muscles, bones and nerves with its blood vessels where it could re-connect (anastomos) in the right place. The wide loss of full thickness tissue in the scalp is considered as a serious challenge for the reconstructive surgeon and the micro surgery is considered one of the most important methods of reconstruction of such defects. Objective: To study the importance of the use of free flaps in the reconstruction of the wide defects and loss of tissue in the scalp in Al Mouassat Hospital patients.