In this book, Bacteria Concrete is discussed with important concepts along with case study. Micro-cracks are the main cause to structural failure. One way to circumvent costly manual maintenance and repair is to incorporate an autonomous self-healing mechanism in concrete. One such an alternative repair mechanism is currently being studied, i.e. a novel technique based on the application of biomineralization of bacteria in concrete. The applicability of specifically calcite mineral precipitating bacteria for concrete repair and plugging of pores and cracks in concrete has been discussed and studies on the possibility of using specific bacteria as a sustainable and concrete-embedded self-healing agent are discussed.