The phenomenon of the spread and increase the degree of reservation in the financial statements of the most controversial issues in contemporary accounting thought that formed the focus of attention of many accounting literature, despite exposed to severe criticism because of incompatibility with some of the qualitative characteristics of accounting information, this research provides more evidence about the level of accounting reservation in the financial reports for companies to contribute to Iraq, it also sheds light on the relationship of the accounting reservation improving the quality of financial reporting and the impact of this relationship on the value of the business in the capital markets, the reservation may be used by the company management as a way to choose between accounting alternatives are opportunistic in practice by some policies accounting applied by the companies, and in the multiplicity of accounting policies and estimates alternatives to achieve these goals, collected necessary to test hypotheses data, the study found indicators statistically significant on the level of accounting reservation in the financial reports issued by joint stock companies listed in the Iraq Market Securities.