Injury in the oral cavity is common in infants, but injury penetrating into the deep tissue in the oral cavity is rare. We reported a rare injury penetrating into the paraspinal canal from the mouth by a wooden chopstick. A three-year-old boy fell on his face during dinner, and the wooden chopstick he was using pierced his mouth. The broken chopstick could not be found by X-ray examination, but continuous examination to detect the broken chopstick was necessary to determine penetrating injury into the cavity. On CT examination, the broken chopstick was found in his paraspinal canal, and it was removed by posterior cervical spinal approach. He was discharged without any complications.
