A new flavonoid glycoside, 4'-O-(p-hydroxybenzoyl)-isorhamnetin-3,7-di-O-beta-D-glucopyranoside (1), and 4 known compounds, sitosterol beta-D-glucoside (2), bis(2-ethylhexyl) adipate (3), p-hydroxybenzoic acid (4) and ethyl docosanoate (5), were isolated for the first time from Campanula lactiflora and their structures were deduced by high field 1D and 2D NMR and (+) FAB and EI mass spectra.