Hypophosphatemic vitamin D-resistant rickets or X-linked hypophosphatemia (XLH) is a rare hereditary metabolic disease manifesting marked hypophosphatemia, short stature and rickets. Its prevalence is approximately 1 in 20 000. Except early exfoliation of the teeth, there are a few oral findings of XLH described in China.1,2 Here we present two cases in one family.