The independence of the Central Asian and South Caucasus republics in the early 1990s and the establishment of new states along the Caspian Sea inevitably affected the legal status of the Caspian Sea, which had been formed incompletely by previous treaties, and the unilateral actions of the Caspian Sea littoral states in the field of exploitation of the sea's energy resources and the signing of oil and gas contracts with large Western companies had caused disagreements and ambiguities about the legal regime of the sea and the exploitation of undersea resources. The influx of Western oil and gas companies to exploit the black gold in the Caspian Sea, along with the difficulties of not determining the legal regime of the Caspian Sea, further widened the differences between the littoral states and prolonged the negotiation process to reach a comprehensive agreement. The signing of the "Convention on the Legal Status of the Caspian Sea" as an important achievement, while resolving many ambiguities and disagreements on the issues regarding the Caspian Sea, will determine the general framework of cooperation among littoral states and will turn the Caspian Sea into another pole of regional cooperation. This article has been compiled with the aim of exploring the causes and areas of cooperation among littoral states in the light of the Convention on the Legal Status of the Caspian Sea and seeks to provide an appropriate answer for the following question; "how the Convention on the Legal Status of the Caspian Sea could affect and improve cooperation among littoral states?" The article hypothesizes that by removing many ambiguities about the legal regime of the Caspian Sea, the Convention on the Legal Status of the Caspian Sea, creates new opportunities for cooperation among littoral states. The present article is of qualitative (descriptive-analytical) type and using methodology (inductive-inferential), the data have been analyzed by library study and documentary analysis.