In recent years, the number of falling accidents of elderly pedestrians tends to increase. One of these causes is a change of the center of gravity position at sole. This reason is that the elderly people are difficult to balance the center of gravity position by decline of their leg strength. Therefore, they become easy to fall. Thus, in order to solve these problems, developments of new products to prevent fall motion are desired. In this study, we propose high performance shoes to enable stable walking. That is to say, in order to develop the shoes, we use the Sponge Core Soft Rubber Actuator (SCSRA) as the pneumatic element. The SCSRA can control the stiffness with change of internal pressure of the element. In this paper, we use the actuator as an insole of shoes. Moreover, the effectiveness of the proposed shoes is indicated through some experimental results.