Backgrounds/Aims: The aim of this study was to analyze clinicopathologic feature of early colon cancer diagnosed by endoscopic resection. Methods: 41 early colon cancers from 22 patients endoscopically removed during the period from 2001.1~2002.6 were analysed. Results: 22 patients who were diagnoised as early colon cancer patient had totally 210 colonic polyps and 41 early colonic cancers. Most common age of distributuion was 6th decade. Of the 41 early colon cancers, malignant polyps less than 5 mm in size were in 43%, 6~10 mm in 10%, 11~20 mm in 21%, >21 mm in 26%. Malignant polyps were more common in left side colon than right side colon (7:3). Endoscopic shapes of early colon cancers were mostly sessile type (sessile type were in 90.2%). Conclusions: Significant fraction of early colon cancers were less than 1 cm in size. To detect and treat early colon cancers more earlier, It is advisable to remove all of the colon polyps even though small polyps. (Intestinal Research 2003;1:51-54)