A 72-year-old woman underwent high anterior resection for rectal cancer. Fifteen minutes after the start of the operation, the pressure on the respiratory tract rose, blood pressure and SpO2 dropped, and skin rash, wheezing and ECG disorder appeared. The anesthesiologist suspected latex anaphylaxis and interrupted the operation. The patient was treated immediately for anaphylactic shock, and recovered. Post-operation, she showed positive reaction to latex specific IgE, suggesting that the anaphylaxis was induced by latex allergy. A re-operation was performed under a latex-free environment. No allergic reaction was seen during or after the re-operation.