From the leaves of Sambucus sieboldiana BLUME, ex GRAEBN. var. Miquelii (NAKAI) HARA were isolated a colorless waxy substance which is almost composed of a mixture of α-amyrin and β-amyrin palmitates, ursolic acia, β-sitosterol, kaempferol, quercetin, sucrose, and a large amount of potassium nitrate (about 5% of dried leaves). Oleanolic acids, stigmasterol, and campesterol were detected by gas-liquid chromatography, and also glucose, fructose, and two flavonoid glycosides by paper chromatography. Chemotaxonomy of Sambucus species has been briefly discussed.