目的比较健康人优势和非优势前臂的骨面积（Ａｒｅａ）、骨矿含量（ＢＭＣ）和骨矿密度（ＢＭＤ）。方法采用双能Ｘ线骨密度仪测量５５例１６～７３岁（平均年龄５２岁）健康志愿者双侧前臂（优势臂均为右臂）的Ａｒｅａ、ＢＭＣ和ＢＭＤ。结果右前臂各部位Ａｒｅａ、ＢＭＣ显著高于左前臂（Ｐ＜０．００１和Ｐ＜０．０５），除桡骨远端１／３段ＥＭＤ右前臂显著高于左前臂外（Ｐ＜０．０１），其余部位ＢＭＤ左右侧无差别。结论优势臂的Ａｒｅａ和ＢＭＣ均高于非优势臂，而ＢＭＤ两者差别不大。 Objective To compare the bone area, bone mineral content (BMC) and bone mineral density (BMD) of healthy and non-dominant forearms. Methods Area, BMC and BMD were measured by dual energy X-ray absorptiometry in 55 healthy volunteers aged 16-73 years with average age of 52 years. Results Area and BMC in the right forearm were significantly higher than those in the left forearm (P <0.001 and P <0.05), except that the right forearm in the distal 1/3 of the distal radius was significantly higher than that in the left forearm (P <0.01) ), The rest of the left and right BMD no difference. Conclusion The area and BMC of superiority arm are higher than that of non-superiority arm, while the difference of BMD is not significant.