Synovial chondromatosis has been rarely reported to occur in the spine with only one case found in the lumbar spine. We describe another case of synovial chondromatosis in the lumbar spine in a 41-year-old man who presented with compressive myelopathy. The tumor was located in the left ventrolateral corner of the epidural space just below the L₄–L₅ intervertebral space. Besides being extremely rare, our case was unusual in that the juxtaposed facet joint was radiologically normal.