An apparatus for absorbing vibrations of components of heavy construction equipment is disclosed, which comprises an elastic support ring which has a tightening part at both ends of a longitudinally extended body for thereby absorbing and decreasing vibrations transferred from heavy construction equipment to components by connecting and fixing the fixing part and the vibration part as the elastic support ring is tightened wherein the apparatus for absorbing vibrations of components of heavy construction equipment is installed between a fixing part for mounting components of heavy construction equipment such as a handrail, work mirror, etc. and a vibration part which generates lots of vibrations for thereby absorbing and decreasing vibrations of components of heavy construction equipment.