As part of study of the constituents of bamboo grasses, the leaves of Sasa borealis (Hackel) Makino (Gramineae) were examined. Friedelin, glutinol, isoorientin and isovitexin have been reported as constituents of bamboo grasses. In this study, tricin and two flavone glycosides, tricin $7-O-{eta}-D-glucopyranoside$ and luteolin $6-C-{alpha}-L-arabinopyranoside$ have been isolated from EtOAc extract of S. borealis, by consecutive silica gel, Sephadex LH-20 column chromatography and a repetitive HPLC. The structures of these compounds were determined by IR, $^1H-NMR,;^{13}C-NMR,;^{13}C-^1H;COSY,;^1H-^1H;COSY,;HMBC$ and Mass spectral data.