Osteoblastoma is a rare benign bone tumor and is characterized hitologically by an abundant number of osteoblasts and by the presence of s large amount of osteoid tissue in a highly vascular matrix. The lesion is frequently encountered in children and adolescents with most of the cases occuring between the ages of 10 and 25 years. There is significant sex prevalence (M.: F.=2: 1). Up to now there has been few reports of a benign osteoblastoma occuring in the cervical spine. This report describes a boy of a benign osteoblastoma which involved the cervical vertebral arch and spinous process, presenting with pain and limitation of motion. He was given en-bloc resection of tumor mass and confirmed by histological examination. Postoperation result was good and he goes school without any problem in about 12 months of follow up.