集体安全条约组织（俄文：Организация Договора о Коллективной Безопасности，缩写：ОДКБ）是在独立国家联合体中的俄罗斯、哈萨克斯坦、吉尔吉斯斯坦、塔吉克斯坦斯坦、白俄罗斯和亚美尼亚六国签订的《集体安全条约》的基础上成立的一个新的区域性国际组织，成立于2002年10月7日。乌兹别克斯坦一度加入该组织但后来退出，现有6个成员国。

The Collective Security Treaty Organization (CSTO; Russian:Организация Договора о Коллективной Безопасности, Organizatsiya Dogovora o Kollektivnoy Bezopasnosti, ODKB) is an intergovernmental military alliance that was signed on 15 May 1992. In 1992, six post-Soviet states belonging to the Commonwealth of Independent States—Russia, Armenia, Kazakhstan, Kyrgyzstan, Tajikistan, and Uzbekistan—signed the Collective Security Treaty (also referred to as the "Tashkent Pact" or "Tashkent Treaty"). Three other post-Soviet states—Azerbaijan, Belarus, and Georgia—signed the next year and the treaty took effect in 1994. Five years later, six of the nine—all but Azerbaijan, Georgia, and Uzbekistan—agreed to renew the treaty for five more years, and in 2002 those six agreed to create the Collective Security Treaty Organization as a military alliance. Uzbekistan rejoined the CSTO in 2006 but withdrew in 2012.