Constituents of the roots, the stem bark, and the leaves of Clausena excavata BURM. f. (Rutaceae) grown in a greenhouse at Okitsu Branch, Fruit Tree Research Station, Shizuoka, were studied. New carbazole alkaloids named clauszoline-H $(1)$ , -I $(2)$ , and -J $(4)$ from the roots, clauszoline-K $(6)$ and -L $(7)$ from the stem bark, and clauszoline-M (8) from the leaves were isolated, together with known carbazoles and coumarins, and their structures were elucidated by spectroscopic methods.