Transient neurological syndrome often occurs after spinal anesthesia with lidocaine, but relatively infrequently with bupivacaine. We describe a case of transient neurological syndrome, which occurred after spinal anesthesia with 15 mg of 0.5% bupivacaine. Transurethral resection of the bladder was performed in the lithotomy position. There were no problems during the spinal anesthesia and surgery. However, the first day after surgery, the patient complained of paresthesia and pain over the L4-5 dermatomes in both legs, but without decrease of muscular strength. The senses in this area returned to normal over the following 2 weeks. Even though this one case of a patient with transient neurological syndrome after bupivacaine spinal anesthesia is reported, the authors still consider bupivacaine relatively safe for spinal anesthesia.