Purpose: In this article attempt is made to develop a composite food security index for some selected countries of the Economic Community of West-African States (ECOWAS), e.g. Nigeria, Niger, Benin, and Ghana. The study also aims to study the stability property of the indicators of composite food security index. Approach/ Methodology/ Design: For constructing a composite food security index for ECOWAS, one can use the basic methodology already developed by IFAD but in a modified form. This study is also based on IFAD methodology but with one more additional variable that is political stability index and assigned weight on the basis of Principal Component Analysis (PCA). Findings: This composite index is an improvement over all the other food security index developed by others eminent economists and institutions from time to time. This index consists of six indicators such as food availability, food production, self-sufficiency of food, inverse relative price index, child survival index, and political stability to construct the composite food security index of ECOWAS. Political stability is an additional indicator in the index of ECOWAS. With the help of this index, the trends, stability and situation of food security index in region are discussed and analyzed from 2001 to 2018.After careful analysis of composite food security index of ECOWAS, one can find out that It has quite impressive and improving gradually. Practical Implication: This study provides strong suggestion about how these five indicators of composite food security index provide an overview for the selected countries to secure their level of food security in their respective country. Originality/Value: After the careful analysis of the collected data, it can be concluded that the composite food security index plays an important role to understand whether food security index is improving in respective countries or not.