Desmoplastic fibroma (DF) is a rare, benign fibrous tumor of the bone which is locally aggressive. Desmoplastic fibroma forms 0.3% of the benign osseous tumors, which most commonly occurs in the tibia, scapula, and femur. Most commonly affected site in the head and neck region is Mandible. Desmoplastic fibroma causes bone destruction and has a high tendency for local recurrence. In this case report, we present desmoplastic fibroma of mandible of 5year old female patient with imaging, histopathology, treatment and discussion about prognosis.