This article examines the role of treaty bodies in the development and enforcement of international human rights law. It explains that there are now nine core human rights treaties and each of them provided the establishment of its own monitoring committee which includes the Convention on the Elimination of Discrimination against Women (CEDAW) Committee, the Committee against Torture and the Committee on Enforced Disappearances (CED). This article discusses the composition, functions and the decision-making process of these committees.