We report magnetic resonance imaging findings of massive spinal subarachnoid hemorrhage (SAH) caused by repeated lumbar punctures during spinal anesthesia in a 36-year-old man. The signal intensities of spinal SAH were similar to those of the conus medullaris on both T1 and T2- weighted spin-echo images. Although spinal SAH is hardly recognized on MR, spinal SAH of sufficient amount may cause alteration of the cerebrospinal fluid signal.