A rare case of a hand injury caused by breakage of a the rmometer is reported. A 39-year-old female injured her right hand and mercury entered into her hand from the palmar side. The sublimis tendon of her ring finger and median nerve were partially cut by the head of the thermomrter, and mercury balls entered into her Capitatum. We tried to remove the mercury with suction, but were unable to remove all of it. X-rays taken at follow-up revealed that the amount of was decreasing. Medical symptoms due to the mercury did not appear and there was no increase in her blood mercury concentration.
