Abstract: An apparatus for warning a loading excess of vehicle includes: a motion conversion mechanism which is mounted to a lower arm rotatably mounted in a body of a vehicle, and converts a motion of the lower arm by a drooping body to a rotational motion; a rotation disc which rotates by receiving a torque from the motion conversion mechanism, and has two slit holes whose lengths are different from each other along a circumference; an overload sensing device for sensing an overload through a medium of the slit holes of the rotation disc; and an attention calling device which are operated by selectively receiving a power supply through the overload sensing device, and calls the driver's attention to the overload.