By concluding a lawyer's contract, the lawyer and the client will have rights and obligations against each other, one of the duties and obligations of the lawyer against the client, the duty to take care of the property, information, and other rights of the client, and the use and application of his skill and knowledge in the relationship With the subject of the lawyer. Since a lawyer has an iadi, he must use all his efforts to protect his family and his other clients' rights, and, on the other hand, the lawyer accepting the lawyer should have the knowledge and experience necessary the other hand, due to the expansion and complexity of social relations as well as the specialization of affairs, professional occupations and the need for the owners of those professions to be filled with the necessary knowledge and knowledge, therefore the basic question here, the response to the conditions and how to take responsibility A lawyer is a skill in case of violation of duty. In Iran's law, the task of care is very little and there is no clear or implied clause in the law on the lawyer's skill. Unlike our rights, in the law of the United States, including the United States, a special chapter of the lawyer's obligations to the client The duty of the lawyer's care and skill has been paid, and the necessary and sufficient conditions for the fulfillment of these duties, the liability of the attorney and how to compensate are foreseen. However, in our law, although these tasks have not been addressed, they can be read in the circle and the scope of the duty of the lawyer, which means that the violation of these duties is in fact a violation of the lawyer's duty. It is precisely in the law of Kamen Leo that these duties of lawyer's care and attorneys are also an integral part of the duties of duty.