This study discusses the topic of the responsibility of the international aviation carrier in the contract of passengers' transport according to the international conventions and the Omani law (comparative study), and it also discovers the compatibility of the legal rules presented in the Omani laws and the international conventions. The study discussed the topic in three chapters. The first chapter has introduced the definition of the international aviation carrier of passengers' transport, its distinguished features, and the commitments of each one of the contractors. The second chapter focused on the legal framework of the international aviation carrier responsibility in the contract of passengers' transport and examples of its responsibilities related to passengers' safety and transport delay issues. This chapter also focused on comparing these responsibilities according to the international rules and the Omani laws. The third chapter; however, discovered the results of implementing the legal responsibility of the international aviation carrier in the contract of passengers' transport researching in the penalties for non-compliance with this responsibility ( financial and moral compensation), clarifying the responsibility allegation, its parties, and its impacts. Finally, the study was concluded with the findings and some recommendations.