This study aims to identify the civil liability of the consulting engineer according to the Omani law by answering the following questions: Who is responsible for the agreement of undergoing medical treatment? Are they the parents? If yes, what is the sentence in the case of disagreement between them or divorce; or if their absence is required; or if their presence is required while the juvenile is admitted in a nursing home or a penal institution? To answer these questions the researcher has completed the following: 1. Collect Omani laws related to the practice of Medicine in the Sultanate of Oman. 2. Collect a number of doctrinal resources whether it be general or specialized within or outside the Sultanate. 3. Collect several judicial rulings which were harnessed to benefit the study. The Main Results of Dissertations: Some of the most prominent results that the study has attained are as follows: 1. The incapability of the incompetent underage patient to understand the simple and/or complex medical works. 2. It is the responsibility of the juvenile's guardian to take care of his treatment which will insure him a happy, relaxing life. 3. Originally it is the father that is the guardian to his children and therefore he is responsible for them whether or not he is still married to the mother of the children; however, this origin could face certain obstacles and hence he is neglected and disregarded and the patient would be treated without anybody's consent. There are some cases in which the mother can interfere in being in charge for treating her children. 4. From the moment of birth until the legal age a person experiences different stages during growth in which he/she develops his/her abilities and capacities; however these capacities defer from one person to another. 5. It is originally the patient that makes the decision on treating himself; and exceptions are made from ones who have greater and higher legal authority over the patient concerning his treatment regardless of its type.