The inner and outer walls of the alimentary canal of Choroedocus violaceipes Miller were observed with a scanner. Morphological features of the alimentary canal are as follows; the esophagus is straight and has several rows of longitudinal ridges; the crop is composed of Vshaped bends, Vshaped ridges, lanceolate ridges, fanshaped ridges and irregular ridges; the cupshaped proventriculus has several rows of longitudinal ridges; the cardia are surrounded by 6 Yshaped structures that protrude from the gut wall; the midgut is membranous and comprises 20% of the length of the alimentary canal; the pylorus is surrounded by 12 pyloric valves; the ileum is membranous and surrounded by 6 rows of longitudinal ridges; the colon is thinner than the ileum and also formed of 6 rows of longitudinal ridges; the rectum is formed from 6 rows of longitudinal ridges that extended from the ileum and colon. The main feature of the rectum is that there are 6 rectal pads between the longitudinal ridges. The length and the function of each part of alimentary canal are discussed. This study not only presents a simple method for investigating the insect alimentary canal but also provides a basis for research on grasshopper physiology and locust control.