Introduction: Peritoneal tuberculosis (TBCP) is a diagnostic challenge because the clinical, radiological and laboratory findings are nonspecific and can be confused with other pathologies. Presentation of the clinical case: Patient who consulted for intense abdominal pain, fever and diarrhea. TBCP was suggested based on abdominal CT findings, which was confirmed by histopathological analysis of parietal peritoneum biopsy and granulomatous lesions of the small intestine mesentery. The patient received an antituberculous regimen and was discharged from the hospital. Discussion and literature review: CPTB represents between 25-50% of abdominal tuberculosis cases and 0.1-0.7% of all tuberculosis cases, its clinical presentation includes ascites, abdominal pain, fever and diarrhea, making it indistinguishable from tuberculosis. Bacterial peritonitis and other chronic abdominal conditions. Conclusions: The diagnosis of TBCP is a challenge, however, the tomographic findings provide information that increases its suspicion and helps to avoid treatment delay and complications.