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Sinistral portal hypertension is caused by various pancreatic pathologies, including neoplasms. Bleeding from the collateral circulation due to sinistral portal hypertension obscures the operative field during laparoscopic distal pancreatectomy. A female patient in her 40s presented with a mucinous cystic neoplasm complicated by sinistral portal hypertension that was successfully managed with splenic arterial embolization followed by laparoscopic distal pancreatectomy. The intraoperative blood loss was minimal, and the patient did not require blood transfusions during the perioperative period. Preoperative splenic arterial embolization is feasible, safe, and effective in avoiding massive hemorrhage from the collateral circulation due to sinistral portal hypertension during laparoscopic distal pancreatectomy.