The application of materials exhibiting pozzolanic properties in concrete has become the need of the hour. Evaluating the pozzolanic activity of materials that replace cement is gaining significance due to the growing demand for environmentally sustainable cement products. Incorporating bamboo leaf ash (BLA) as supplementary cementitious material (SCM) in concrete aligns with the principles of sustainable construction by reducing waste, utilizing renewable resources, and potentially lowering carbon emissions associated with traditional cement production. In this study, BLA is used as a partial replacement for ordinary Portland cement (OPC) in ranges of 10%, 20%, and 30%. Experimental results on hardened properties showed that concrete mixed with BLA gives satisfactory cube compressive strength up to the replacement level of 20% with OPC as a binder. Beyond 20% replacement, cube compressive strength falls below the characteristic strength of concrete.