FNH is a benign lesion of the liver which is rare in children. We report the case of a 6-year-old child (male) with a huge FNH which size is more than 10 cm. This could be the biggest FNH among all children’s FNH cases ever reported. When pediatric FNH patients accord with (1) clinical symptoms; (2) indefinite diagnosis or hepatitis B virus carriage; (3) tumor size >5 cm, surgical treatment could be considered.