Most countries of the world seek to develop their national economy through attracting foreign capitals that contribute to new investment projects, for the purpose of using their resources more effectively and efficiently, achieving higher growth rates, raising the level of production and increasing exports to other countries. Therefore, these countries compete to create an environment which attracts foreign investors searching for concessions and guarantees against non-commercial risks, as well as to overcome unnecessary administrative and procedural obstacles, taking into account not to violate national goals. The strength of local legislation related to investment and the incentives and guarantees provided by this legislation to foreign investors is one of the most prominent factors which encourage foreign capitalists to invest directly in such countries. Therefore, this purpose of this thesis is to examine the incentives and guarantees stipulated by the Foreign Capital Investment Law issued under the Royal Decree No.50/2019 which brought new provisions that require to be examined and that the extent of its attractiveness to foreign investors shall be tested, in terms of the incentives included in this law and the guarantees under which the rights of investment projects are guaranteed to be protected. In accordance with the division made by the legislator, this research has been addressed in three chapters: introductory chapter which helps understanding the terms of the subject of study, such as the concept of foreign direct investment and discrimination between it and other types of investments, a chapter about incentives of the foreign investment project, which examines the advantages provided by the legislator to such projects and measures the extent of their attractiveness to foreign investors, and the last chapter which addresses the guarantees of the foreign investment project, which addresses the extent of their sufficiency in providing legal protection for the assets and rights of foreign investors. Because this law is recent, we did not find scientific references examining it, so different means were used in some Arab references to explain other investment legislation, along with local references that examined previous foreign capital investment laws, and Arab and foreign scientific articles, as well as laws and agreements, and then analyze and compare them, in order to find out the objectives of this research.