Medicinal herbs have long been used as traditional medicine to treat infectious diseases. The increasing use of synthetic antibiotics today has led to an increase in resistant strains and high side effects. In this regard, every year many researchers from this huge plant source are sending a range of secondary compounds to the consumer market for the treatment of human diseases. Therefore, the identification of herbs with antimicrobial effects can help to produce new drugs with a broad spectrum of effects. This study, based on scientific references, describes information on the antimicrobial effects of rosemary.