Basal cell ameloblastoma (BCA) is a rare histological variant of ameloblastoma. It is composed of densely packed nests and strands of basaloid cells with inconspicuous stellate reticulum‐like cells. To date, there are only 24 reported cases of BCA in the English language literature. Ameloblastoma in children is relatively an uncommon tumour and accounts for approximately 15% among all odontogenic tumours. We report a case of BCA in an 8‐year‐old Iban girl who underwent hemimandibulectomy and reconstruction of the mandible with costochondral graft (CCG). A 6 months review showed that healing process was uneventful. She is under regular follow‐up and monitoring since multicystic ameloblastoma tend to recur and also the growth of the CCG is extremely unpredictable.