Spigelian hernia, also known as lateral ventral hernia, is a type of hernia arising through the Spigelian aponeurosis. Unlike many other ventral hernias that occur beneath the layer of fat and abdominal skin, Spigelian hernia is situated within the abdominal wall muscles. Spigelian hernia often presents with few symptoms and may exist for a long time without being diagnosed or detected. We report a case of Spigelian hernia causing an intestinal obstruction treated with surgical emergency abdominal wall reconstruction using the sublay technique. Identification and evaluation of cases with the potential for hernia occurrence are crucial for the safety of patients undergoing surgery. Spigelian hernia accounts for 1%-2% of all ventral hernia cases. Currently, there are no reports on Spigelian hernia in Vietnam. However, a few reports on surgical management of Spigelian hernia have been published worldwide, with approaches including laparoscopic and open surgery, and these reports have indicated that abdominal wall reconstruction using the sublay technique is feasible as it is associated with fewer postoperative complications and shorter hospital stays. Here, we describe the case of an 87-year-old woman presenting with swelling and pain in the lower left quadrant of the abdomen. A preoperative diagnosis of Spigelian hernia causing intestinal obstruction was established, and we proceeded with abdominal wall reconstruction using the sublay technique. The patient was discharged three days after surgery without any postoperative complications.