We report the case of a female patient, 13 years old, with an osteoid osteoma of the left talar neck. The tumor was arthroscopically removed. Pathological examination confirmed the diagnosis of osteoid osteoma. Preoperative, the patient had severe pain in the ankle joint, walked lame, and was unresponsive to pain relief medicines, even Aspirin. Post-operative, there was immediate and complete pain relief and the patient remains asymptomatic after 06 weeks.