A leg strength measuring apparatus is capable of measuring a gravity center distribution of loads and leg strength which can in turn serve as a reference for the selection of a ski, a snowboard, ski boots, or snowboarding boots appropriate for a user of the apparatus. The leg strength measuring apparatus includes two footplates upon which a person to be measured steps separately with his left and right feet, and load sensors for detecting loads applied to each of the footplates at least at three points.