Abstract: In order to supply some information to the study about relations between the morphology and functions of glandular hairs on tobacco leaves, the micro-morphology of glandular hairs on the surface of leaves of the tobacco cultivar Nicotiana tabacum K346 were observed by scanning electron microscopy. The long stalk glandulars on the surface of tobacco leaves commonly have several cylindrical nodes on the parts of stalk, the short stalk glandulars have thicker stalk with one short cylindrical nodes; the head of glandulars, the main of the secretive function parts, which has complex structure with larger than its stalk, especially the head of the short stalk glandular, wrinkly around with obviously convex and concave; The morphlogy of glandular hairs on tobacco leaves have relations with its secretive functions, the information of glandular hairs micro-morphology may benefit to the study on the relation between the function and morphology.