Chemical examination of the leaves of Rubus coreanum has led to the isolation and characterization of six phenolic compounds. The structures of these compounds were elucidated as kaempferol(l), quercetin(2), sodium salt of quercetin 3-O-$eta$-D-glucuronide(3), sodium carboxylate of quercetin 3-O-$eta$-D-glucuronide(4), ellagic acid(5) and sanguiin H-5(6) on the basis of physicochemical and spectroscopic evidences.