ln order to search for antigastric cancer agents from Korean traditional prescriptions. We selected 41 traditional prescriptions, based on a review of the Korean traditional medicine books. Both boiling water and methanol extracts were tested, by means of the Sulforhodamine B (SRB) protein assay. Six of the 41 water extracts; #3, #34, #35, #38, #40, #41 showed efficacy against gastric cancer cell (AGS: Human gastric carcinoma, ATCC HTB 103). #3 inhibited 50% cancer cell growth1 at the concentration of $152\;{\mu}g/ml$, #34, #35, #38, #40 and #41 inhibited 50% cancer cell growth at the concentration of $145\;{\mu}g/ml$, $129\;{\mu}g/ml$, $173\;{\mu}g/ml$, $10\;{\mu}g/ml$ and $19\;{\mu}g/ml$ respectively. Ten of the 41 methanol extracts; #1, #3, #32, #33, #35, #36, #37, #38, #41 were active. #1 inhibited 50% cancer cell growth at the concentration of $206\;{\mu}g/ml$, #3, #32, #33, #35, #36, #37, 738, #40, #41 inhibited 50% cancer cell growth at the concentration of $133\;{\mu}g/ml$, $159\;{\mu}g/ml$, $199\;{\mu}g/ml$, $147\;{\mu}g/ml$, $113\;{\mu}g/ml$, $187\;{\mu}g/ml$, $130\;{\mu}g/ml$, $9\;{\mu}g/ml$, $15\;{\mu}g/ml$ respectively. Prescription #3, #35, #38, #40, #41 were also interesting because both methanol and water extracts were active.