Aeromicrobiology deals with the study of air borne microorganisms and viruses along with important particulate matter of air, especially smoke, dust and pesticides. Hospital is an important indoor environment responsible for the spread of airborne pathogens which later on is transmitted to other individuals viz., patients, hospital workers, visitors, etc. In turn it is carried over patients. Squames from the skin of persons may contain many pathogenic bacteria which are transmitted to patients. Hospital environment is responsible both for indoor and later outdoor community and represents a congenial situation where microorganisms and susceptible patients are together indoors. The estimation of the quantity and types of airborne microorganisms serves as an index for the cleanliness of the environment as well as a profile reveling human health and hospital-acquired infections. Evaluation of microbial count, types, and diversity in hospital indoor environments is of growing concern. Therefore, attempts must be made to check the spread of pathogens in the hospitals so that primary and secondary infections could be avoided.