We report the case of a patient with intractable pain secondary to a spinal cord injury whose pain was relieved with an intrathecal steroid block (ITSB). The patient was 70 years old, and 22 years earlier his spinal cord had been injured in a traffi c accident. He experienced the symptoms of pain in both legs after the accident. We decided to perform an ITSB. For the ITSB, a 25-gauge spinal needle was inserted between the patient's L4 and L5 vertebrae, and a solution of 10% glucose (2 ml) and dexamethasone (4 mg) were injected into the intrathecal space. Eight days after the ITSB, the patient's self-reported pain rating on a visual analog scale was no pain. No recurrence or side effects have been reported after this treatment. The effi cacy and safety of injecting steroid medications into the intrathecal require further study, but the present case confi rms that ITSB can be an effective cure for intractable pain secondary to a spinal cord injury.