The modern-day project management has focused on the risks management due mainly to the complexities in nowadays projects. On this factual basis, recognizing and mitigating the most critical project risks assist in achieving more efficiency in the project management. Therefore, an effective project management system will help projects not to fail meeting their due dates, not to fall short on customer expectations, and also not to exceed the budget. In this article, an intuitionistic fuzzy Decision making Trial and Evaluation Laboratory (DEMATEL) is presented in order to prioritize risks of the construction projects. In this study, the Risk Breakdown Structure (RBS) presented by the Project Management Institutes’ (PMI) is utilized as a framework. The project expert opinions are collected as a source of knowledge through a number of questionnaires. Intuitionistic fuzzy sets (IFS) theory which benefits from a number of merits compared to classic fuzzy sets theory is applied to tackle the vagueness and imprecision of human subjective judgments. The results have revealed that “External” risks were the most significant risk categories in the construction projects.