This review paper discusses the use of nano materials in concrete. In recent years, the application of nano materials has received considerable attention for enhancing the properties of conventional concrete. The primary purpose of incorporating nano materials into concrete is to improve its strength and durability. A nano material is defined as a material containing particles smaller than 200 nm. However, for concrete studies, the effective particle size is typically up to 500 nm. The addition of ultrafine nano materials can reduce cement consumption by partially replacing cement on a weight basis, thereby improving the binding effect. These ultrafine particles also act as fillers, reducing the formation of micro pores and producing a denser concrete matrix, which in turn minimizes the growth of micro cracks in ultra-high-performance concrete (UHPC) structures.