An engine reciprocative rotation mechanism, comprising: a piston reciprocating in a cylinder; a connecting rod connecting the piston and a crankshaft together, and including a small end and a large end respectively connected to the piston via a piston pin and to the crankshaft; a cylinder block including an upper block and a lower block attached to a lower surface of the upper block and housing the piston and the connecting rod; the crankshaft having a crank journal, a crank pin, and a crank arm, the crank journal being rotatably supported by the lower block and a main bearing cap; a first dynamic vibration absorber provided in a through hole of the piston pin for the piston, and configured to reduce a vibration level, which is generated during an operation of the engine, at a first resonance frequency; and a second dynamic vibration absorber provided in the through hole of the piston pin for the piston, and configured to reduce a vibration level, which is generated during the operation of the engine, at a second resonance frequency higher than the first resonance frequency, wherein the first resonance frequency is generated by the piston, the piston pin and the small end of the connecting rod which collectively resonate with respect to the large end of the connecting rod in a combustion stroke of the engine, the second resonance frequency is generated by the lower block caused by the vibration in the main bearing cap, the second dynamic vibration absorber is higher in resonance frequency than the first dynamic vibration absorber, and characterised in that in the resonance frequency of the first dynamic vibration absorber and the resonance frequency of the second dynamic vibration absorber in order for a peak frequency of antiresonance occurring in a higher frequency region of the first dynamic vibration absorber than the resonance frequency of the first dynamic vibration absorber to be higher than that of antiresonance occurring in a lower frequency region of the second dynamic vibration absorber than the resonance frequency of the second dynamic vibration absorber, the resonance frequency of the first dynamic vibration absorber shifts toward the higher frequency region in relation to the first resonance frequency and the resonance frequency of the second dynamic vibration absorber shifts toward the lower frequency region in relation to the second resonance frequency. a piston reciprocating in a cylinder; a connecting rod connecting the piston and a crankshaft together, and including a small end and a large end respectively connected to the piston via a piston pin and to the crankshaft; a cylinder block including an upper block and a lower block attached to a lower surface of the upper block and housing the piston and the connecting rod; the crankshaft having a crank journal, a crank pin, and a crank arm, the crank journal being rotatably supported by the lower block and a main bearing cap; a first dynamic vibration absorber provided in a through hole of the piston pin for the piston, and configured to reduce a vibration level, which is generated during an operation of the engine, at a first resonance frequency; and a second dynamic vibration absorber provided in the through hole of the piston pin for the piston, and configured to reduce a vibration level, which is generated during the operation of the engine, at a second resonance frequency higher than the first resonance frequency, wherein the first resonance frequency is generated by the piston, the piston pin and the small end of the connecting rod which collectively resonate with respect to the large end of the connecting rod in a combustion stroke of the engine, the second resonance frequency is generated by the lower block caused by the vibration in the main bearing cap, the second dynamic vibration absorber is higher in resonance frequency than the first dynamic vibration absorber, and characterised in that in the resonance frequency of the first dynamic vibration absorber and the resonance frequency of the second dynamic vibration absorber in order for a peak frequency of antiresonance occurring in a higher frequency region of the first dynamic vibration absorber than the resonance frequency of the first dynamic vibration absorber to be higher than that of antiresonance occurring in a lower frequency region of the second dynamic vibration absorber than the resonance frequency of the second dynamic vibration absorber, the resonance frequency of the first dynamic vibration absorber shifts toward the higher frequency region in relation to the first resonance frequency and the resonance frequency of the second dynamic vibration absorber shifts toward the lower frequency region in relation to the second resonance frequency.