The anatomy of the intestines and its mesenteries of Ctenomys pearsoni have not been described. In the present study, ten adult Ctenomys pearsoni were studied using gross dissection. The small intestine was divided into duodenum, jejunum and ileum as usual. The duodenum started at the pylorus with a cranial portion, which dilated forming a duodenal ampulla. The ileum was very short and attached to the coiled cecum by means of the iliocecal fold. The ascending colon had one ansa with two parts, one proximal and one distal. Both parts of the ascending colon’s ansa were parallel to each other and joined by an apical flexure and the ascending mesocolon. The descending duodenum was fixed to the proximal part of the ascending colon by a peritoneal fold named accessory duodenocolic fold. The ascending duodenum was fixed by the duodenocolic fold to the descending colon. This study indicates that there are minor differences in the divisions of the intestine and their peritoneal folds, as it usually happens when comparing other rodents.