Three new triterpenoid saponins (1–3), together with one known saponin scaberoside B6methyl ester (4) were isolated from an ethanol extract of roots ofAster auriculatus. The structures of1–3have been determined on the basis of spectral and chemical evidence as 3-O-β-D-glucuronyl-16α-hydroxy-olean-12-en-28-oic acid 28-O-[α-L-arabinopyranosyl(1 → 4)-α-L-rhamnopyranosyl(1 → 2)]-[β-D-xylopyranosyl(1 → 3)-β-D-xylopyranosyl(1 → 3)]-α-L-arabinopyranoside (1), the methyl ester of 3-O-β-D-glucuronyl-16α-hydroxy-olean-12-en-28-oic acid 28-O-[β-D-xylopyranosyl(1 → 3)-α-L-arabinopyranosyl(1 → 4)]-[β-D-apiofuranosyl(1 → 3)]-α-L-rhamnopyranosyl(1 → 2)-β-D-xylopyranoside (2), and 3-O-β-D-glucuronyl-olean-12-en-28-oic acid 28-O-β-D-xylopyranosyl(1 → 3)-β-D-xylopyranosyl(1 → 4)-α-L-rhamnopyranosyl(1 → 2)-α-L-arabinopyranoside (3).