Present report deals with the essential oil components from a mint grown in Kinashibetsu- Hokkaido. The plant form of a mint was very similar to that of Mentha arvensis and could run to the seed. So it seems that the mint correspond to a type of M. arvensis. The essential oils consisted mainly of linalool( 83.9~88.7%), limonene( 0.8~4.8%), 3-octanol (0.8~2.8), β-caryophyllene(1.0~3.4%)and germacrene D(1.3~2.8%) from each plant harvested before blooming time, in full bloom and after blooming time