Epidural block is widely used for the diagnosis and treatment of the acute and chronic pain in pain clinic. But, it has several complications like as headache, spinal injury, epidural hematoma and infection including epidural abscess, meningitis and osteomyelitis. Among them, the simultaneous occurrence of psoas and epidural abscesses is extremely rare. We report a patient diagnosed as epidural and psoas absesses one month after lumbar epidural block and treated successfully with surgical decompression and drainage.