The MeOH extract of the root and the ground part of Anthriscus sylvestris Hoffm. showed a high inhibitory activity against MK-1, HeLa, and B16F10 cell growth in vitro. The activity was found only in the CHCI3-soluble fractions. From the CHCI3-soluble fraction of the root, falcarindiol, 1-(3'-methoxy-4',5'-methylenedioxyphenyl)-1 xi-methoxy-2-propene, elemicin, and nemerosin were newly isolated in addition to deoxypodophyllotoxin (anthricin), anthriscusin, (-)-deoxypodorhizone, and anthriscinol methyl ether which were reported earlier as constituents of the root of this plant. From the CHCI3-soluble fraction of the ground part, deoxypodophyllotoxin, (-)-deoxypodorhizone, nemerosin, and falcarindiol were isolated. In vitro antiproliferative activities of the isolates against MK-1, HeLa, and B16F10 cells are reported.