We report our experience of toxic shock syndrome (TSS) in a 54-year-old male patient after high orchiectomy for testicular cancer. Four days after the surgery, he began to have diarrhea, high fever, and diffuse erythroderma followed by severe hypotension. There were no signs of postsurgical wound infection, so serious drug eruption was suspected. Methicillin-resistant Staphylococcus aureus (MRSA) was detected in the culture of the drain and result of skin biopsy, leading to the diagnosis of TSS. Following treatment with intravenous fluids, antibiotics, human immunoglobulin and corticosteroids, the symptoms went into remission. TSS progresses rapidly and becomes life-threatening if treatment is delayed. Therefore, when TSS is suspected in postsurgical patients who experience fever of 39 degrees C or higher, dermal erythema, shock, treatment should be started promptly.