the present invention discloses an bone densitometer comprising a stand including an “ l ”- shape handle consisting of an a horizontal and a vertical plate capable of rotating between an horizontal position and a vertical position on the horizontal plate , a handle groove , a first guide pin and a second guide pin , and a stand groove ; and a housing including an opening formed perpendicular in the center of the upper part , the opening having one or more of the first and the second guide grooves for guiding the movements of first and said second guide pins , a stand settle groove for settling the stand when the stand is settled horizontally , and a stand erecting groove for supporting the stand when the stand is erected in slope .