The purpose of this study is to examine the gait of six postoperative patients being undergone the operation of Toe to Thumb Transplantation by the VICON motion analysis system.Three of the six patients are of Big Toe to Thumb Transplantation,and the other three are of Second Toe to Thumb Transplantation. Through the gait analysis further information can be given for clinical evaluation and therapeutic consideration.A VICON system, force plates and footswitches are implemented in collecting data simultaneoisly.These data are employed for calculating the gait periods and reaction forces from ground to feet with programing in a IBM PC.1) In the case of Big Toe Transplantation it is found the duration for the toe-off foot on the ground is longer. Furthermore, the reaction force and shear stress of in/out step of the toe-off foot are reduced.2) In the case of Second Toe Transplantation we find the duration of the big toe of the toe-off foot on the ground is 30% longer than that of a normal foot. Meanwhile, it is found the reaction force almost keeps constant no matter whether a second toe is on or not.