Concrete is a building material and is widely used in all types of construction works. As we know the concrete is good in compression and week in tension due to microcrack occurs when the load applied on it. Due to these micro-cracks, the concrete loses its strength and water enters through these cracks which causes corrosion to steel. This initiates corrosion makes the whole structure vulnerable and leads to the failure of the structure. Thus, to overcome this problem a technique of adding bacteria into the concrete in order to enhance its properties like compressive strength. The Bacteria may be of liquid or powder form. Together it is called bacterial concrete, in this concrete, the bacteria (Bacillus subtillis) and calcite react with water forms a by-product called calcium carbonate (limestone), which fills the crack and makes the structure sound as it was earlier. This process is called microbiologically induced calcite precipitation. The tests on materials were conducted for the best results and the tests are specific gravity, consistency, Impact Value Test, Shape Test, Sieve Analysis, PH Value (Bacteria), Bacteria Count, etc. The different percentages of bacteria we used in order to know which percentage gives maximum strength. The percentages were made with reference to the amount of cement added into the concrete, the percentages by weight of cement we tried are 1.68%, 2.52%,3.17%,10%,15%, and 20%. And we found 15% of bacterial concrete gave the highest compressive strength in 3 and 7 days test, the result of all tests are given in compressive strength table 2.