This book is including upon two new design, manufacturing and modelling of prosthetic feet. The new feet is most suitable foot for the patient conditions chosen both in energy storing potential and energy return efficiency. The dorsiflexion and eversion angle for the new foot are better than those of the SACH foot. By comparing the characteristics exhibited by prosthetic foot to those of a human foot , a selection of these prostheses was undertaken based on their favorability to the characteristics of a human foot , the new foot has good characteristics . The transfer force from foot to pylon by impact for the new foot is less than that for SACH foot.