Obstructive colorectal cancer is an oncological emergency commonly observed in our daily clinical practice. Conventional treatments such as the Hartmann procedure or stoma creation have been performed to treat obstructive colorectal cancer. Due to the recent introduction of the trans-anal drainage tube and colonic stent placement, emergency surgery can now be avoided. Colonic stent placement is performed as a safe bridge to surgery or palliative treatment for non-curative colorectal cancer, but complications such as perforation or migration may occur. Therefore, scrupulous attention is necessary when a colonic stent is retained. We have experience with six cases of colonic stent treatment: three cases for palliative treatment of non-curative colorectal cancer and three cases for bridge to surgery. Colonic stent placements were successful in all cases, but one patient died with sepsis on the seventh day after placement of a colonic stent. Five patients avoided uncomfortable pain due to ileus tube placement and stoma creation without risking occurrences such as perforation or migration. Colonic stent placement played a satisfactory role in improvement of patient QOL.