An apparatus for shifting the center of gravity of a vehicle having three wheels or more is provided. The apparatus includes: a movable frame having a certain shape and movably fixed, at one side, to a vehicle body in such a manner that a portion or all of the frame is movable to the left/right side relative to the driving direction of the vehicle body; and a control unit for controlling the left/right movement of the frame to shift the center of gravity of the vehicle body as needed, the control unit including: a cylindrical rotation body in which a portion of the inside thereof including the center of rotation is open; a rotation bar coaxially coupled to the center of rotation of the rotation body to rotate with the rotation body along with the rotation of the rotation body; a first link member rotatably coupled, at its one end, to the rotation bar included inside the rotation body; and second link members crossed each other, each second link member having opposite ends wherein one end is rotatably coupled to the other end of the first link member, and the other end is rotatably coupled to the upper portion of the frame, whereby the center of gravity is shifted and restored more easily, effectively, and precisely, and upon stopping, the movement of the vehicle body is precisely controlled.