We have experienced a case of strangulated obstruction squeezed by mucinous cystadenocarcinoma of the appendix coexisted with an appendicular schwannoma. The case involved an 80-year-old man who visited a neighboring hospital because of abdominal pain and vomiting in July 2016 was referred to our hospital with a suspicion of intestinal obstruction. His abdomen was distended. There was mild tenderness in the entire abdomen, but peritoneal signs were absent. An abdominal CT scan showed an ileum to have formed a closed loop and a poorly enhanced tumor of which continuity with the intestine could not be clearly pursued. Strangulated obstruction due to some cord-like structure was likely and an emergency operation was performed. The tip of the appendix had enlarged and the appendix itself squeezed the ileum to cause strangulated obstruction. The ileum revealed only impaired blood flow and had not become gangrenous. Preserving the ileum, we performed appendectomy and completed the operation. The histopathological diagnosis was mucinous cystadenocarcinoma of the appendix coexisted with a schwannoma. In September 2016, ileocecal resection was performed. In the treatment of strangulated obstruction, we should keep in mind that the appendix itself can be the strangulation band.