Objective: To study on chemical constituents from the leaves of Lonicera japonica. Method: The compounds were isolated by column chromatography and identified on the basis of physic-chemical constants and spectral analysis. Result: Seven compounds were obtained and identified as diosmetin(1)

quercetin (2)

tricin-7-O-β-D-glucopyranoside (3)

quercetin-3-O-β-D-glucopyranoside(4)

rutin(5)

loniceroside A (6) and loniceroside B (7)

respectively. Conclusion: The seven compounds were obtained from the leaves of L. japonica for the first time.