Herpes simplex virus (HSV) is one of the common pathogenic viruses of humans bing. This study aimed to determin anti-herpes virus activity of Mentha Piperita extracts in vitro. Mentha Piperita extracts can inhibit HSV infection when the cells treated before viral adsorbtion. HSV-1 were also inhibited by menthol after viral adsorption. HSV-1 viral particles were directly inhibited and viral yield was reduced when treated with Mentha Piperita extracts and menthol. Therefore, Mentha Piperita extracts and menthol showed anti-HSV activities at various stages of the viral replication cycle.