Disclosed is a vibration generator for shoes, including: a flat vibration plate having a length longer than the width thereof; support pieces horizontally protruding in the widthwise direction of the vibration plate; upper and lower casings coupled while restricting each end portion of each support piece, so as to accommodate the vibration plate therein; core magnets fixedly provided in one or more places among the respective end portions in the lengthwise direction of the vibration plate; upper magnets fixed to the upper casing so as to face the core magnets, thereby generating a repulsive force; and bottom magnets fixed to the lower casing so as to face the core magnets, thereby generating a repulsive force.