Antibacterial agent is compound used for medical treatment infection caused by bacteria. Cinnamomum burmanni Nees ex Bl besides used as flavouring agent, it can be used as antispasmodic, antiemetic, and effective for antibacterial. This research is aimed to test th e antibacterial activity of Cinnamomum cortex ethanol extract against S. aureus ATCC 25923, E. coli ATCC 35218 and to identify its chemical component.