This assisting tool is a multi-functional tool that is used in X-ray measurements of a subject. The multi-functionality is achieved by using the outer form and the inner structure of the tool in combination. More specifically, this assisting tool has two inclined surfaces that constitute the outer form. By inserting this assisting tool under the two legs, the two legs can be kept in a posture in which the knees are bent. The side end structure that constitutes the outer form keeps the two feet in a twisted state. A measurement chamber that constitutes the inner structure is for measuring the forearm.本發明之輔助具係一種可在受檢者之X射線測量中使用之多功能型的器具。藉由將其外部結構與其內部構造加以併用來實現多功能化。具體而言，輔助具係具有構成外部結構的二個斜面。當在兩下肢之下側插入輔助具時，能使兩下肢呈膝蓋彎曲之姿勢。構成外部結構之側端構造係用以將兩腳保持在扭轉的狀態。構成內部構造之測量室係用以測量前臂者。
