Obturator hernia, protrusion of abdominal content through the obturator foramen, is a rare type of abdominal wall hernia. Late patient presentation is associated with significant morbidity and mortality. We present rare case of obturator hernia causing small bowel obstruction in a 65-year-old-female patient. She presented with crampy abdominal pain, nausea and vomiting of three days duration. She was diagnosed with acute surgical abdomen and managed surgically at Arsi University College of health sciences, Assela, Ethiopia. Intraoperative finding revealed left-side obturator hernia, which is an extremely rare occurrence. Despite delayed presentation, our patient had smooth postoperative recovery. Obturator hernia is exceedingly rare, and it poses a diagnostic challenge as signs and symptoms are often nonspecific, making a preoperative diagnosis difficult. So, it should be considered as differential diagnosis in elderly patients presenting with acute surgical abdomen.