Phytochemical investigations on the immature buds of Cinnamomum cassia (cassia buds) led to the isolation of fifteen compounds, including two phenylmethanol glycosides (1 and 2), two phenylethyl glycosides (3-5), two butanol glycosides (6 and 7), a megastigmane sesquiterpenoid (8), a pair of isomeric monoterpenoids (9) and their glycosides (10), a monoterpenoid glycoside (11), a geraniol type monoterpenoid (12), two phenolic glycosides (13 and 14), and cinnamic acid (15). Their structures were identified by spectroscopic analyses and comparison with literature data. Compounds 1, 2, and 4-13 were isolated from Cinnamon= cassia for the first time, and compounds 1, 2, 4-7, and 9-11 were reported in the Lauraceae family for the first time. The chemotaxonomic significance of these compounds was discussed.