| This study was conducted to investigate the inhibition role of Liqurice (Glycyrrhiza glabra ) on some bacteria spp ., Watery and Oily Liqurice extracts prepared to study the inhibition effect on ( Listeria monocytogenus , Brucella abortus , Brucella meletensis ,Escherichia. coli , Pseudomonus aeruginosa , Bacillus anthracis Sterne strain , Salmonella typhimurium , Klebsiella pneumoniae ,Staphylococcus aureus ) serial plates powered with cultural media Nutrient Agar were inoculated with one of each bacteria studied then filter papers filled with each type of Liqurice extracts were added and after incubation period then the inhibition Zone were measured . the results revealed that inhibition effect of mixed and Oily Liqurice extracts was more effected on L. monocytogenus , S. aureus , P. aeruginosa , B. anthracis Sterne strain , K. pneumoniae . The mixed extract had no inhibition effect on Br. abortus , Br. meletensis ,E. coli , the Oily Liqurice extract had no inhibition effect on Br. meletensis , S. typhimurium the watery extract had no inhibition effect on the bacteria in this study |