Abstract: A caster buffering device is provided and may include a fixing element for coupling with a truck, a supporting element with a supporting piece, vertical pieces and a base piece. The caster buffering device may also include a working element having an end provided with a wheel and the other end connected to the vertical pieces via a connection shaft, a supporting shaft penetrating a through-hole of the working element and the base piece and connected to a coupling nut at an end and buffering elements penetrated by the supporting shaft and having a top surface elastically supported by an elastic piece of the supporting shaft and a lower end elastically supported by the base piece. The buffering element may be formed of at least two or more portions having different elasticities.