Dried, unripe fruits of Cornus kousa Burg. were extracted with 80% aqueous MeOH and the concentrated extracts were partitioned using EtOAc, n-BuOH and ${H_2}O$, successively. From the EtOAc fraction, three triterpene glycosides were isolated through repeated $SiO_2$ and ODS column chromatography. Based on NMR, MS and IR spectroscopic data, the chemical structures of the compounds were determined to be tormentoside (1), niga-ichigoside $F_2$ (2), and arjunglucoside (3). This is the first report of these compounds being isolated from this plant.