The study sought to clarify the position of Sharia and Omani law on the eligibility of the adolescent, and the problem of this research lies in identifying what the adolescent is legally and legally, and to know the origins and premises under which the adolescent's eligibility in Islamic law and Omani law is judged and the effects of this and the comparison between them, and the most important questions raised by the research are: Who is the adolescent in jurisprudence? And who is the adolescent in law? What are the premises on which adolescent capacity is judged in Islamic law and Omani law, and what are the implications of this? What are the similarities and differences between Islamic law and Omani law in their view of adolescent capacity? To answer these questions, the researcher used the inductive and analytical approach to find out the justifications for the legal and legal provisions related to the adolescent, and used the comparative approach to identify the similarities and differences between the legal view and the legal view of the adolescent's eligibility, and the effects thereof. The researcher has reached a number of results, the most important of which are: that adolescence in psychology begins after puberty and ends with the achievement of adulthood, while in Sharia it is a stage before puberty, and the researcher has found that Islamic law and Omani law agree to grant the adolescent the capacity to be obligatory in all stages of adolescence, and Islamic law is unique in granting him the capacity to perform in all stages of adolescence, while Omani law gives him full capacity to perform in the last stage only of adolescence