Abstract: A print is made of the sole of a foot in a block (1) of modelling clay. If necessary the print is corrected for orthopedic reasons. A rigid shape (23) is cast in the print, and after unmolding, the contour (26) of a sole to be made is marked on the shape in relief. The shape is then used to mark said contour in hollow form in the footprint. The block is then cut through along said contour and the central portion of the block is removed. The rigid shape is reinserted in the remaining peripheral portion of the footprint, and a sole is cast inside the peripheral portion and on the rigid shape. A first sole may be made in a single session in the presence of the patient. Thereafter, the rigid shape may be conserved, and used to make any subsequent soles that may be necessary without requiring the patient to be present.