Two new antifungal resveratrol dimers, cyphostemmins A-B (1-2), have been isolated from the roots of Cyphostemma crotalarioides planch (Vitaceae) together with resveratrol 3 and previously known resveratrol dimers (4-7). Structures of these new compounds have been established on the basis of their MS and 1H and 13C NMR spectroscopic data.