Carcinomas of the large bowel are the third most commonly seen cancer in both males and females and are the second reason of deaths resulting from cancer. The most frequently seen microscopic type of large bowel cancer is adenocarcinoma. Signet-ring cell carcinoma is a rarely seen microscopic subtype of large bowel carcinomas and may be accompanied by other microscopic types. The diagnosis of signet-ring cell carcinomas is made while the count of signet ring cells is over 50% of the tumor cells. The presence and ratio of signet-ring cells should be noted because the prognosis of signet-ring cell carcinoma is very bad. In our case, it is viewed mixt mucinous signet-ring cell carcinoma including mucinous components in the large bowel. This report is presented because it is rarely seen and because the prognosis is very bad and is necessary be specified in the report.