This monograph examines the trends and main areas of arms trade and military-technical cooperation in Southeast Asia over the past decades. In addition to direct acquisitions of weapons and military equipment (WME), the supply of subsystems and components, the licensed production and other forms of militarytechnical cooperation are also considered. Trends in arms trade are analyzed in terms of influence of such factors as internal instability, U.S.-Chinese confrontation in the Pacific region and disputes in the South China Sea, modernization of the armed forces and national defense industries of Southeast Asian countries. Particular attention is paid to various aspects of military-technical cooperation of the regional states with their key arms suppliers – Russia, the US, European countries, China, and South Korea.