POWER TRANSMISSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a power transmission device which inhibits foreign objects from entering thereinto without increasing the number of components.SOLUTION: A power transmission device includes: a pulley 21 forming a driving side rotor; an inner hub 22 forming a driven side rotor; and a plate 26 which are connected to the pulley 21 and the inner hub 22 and serves as a connection member. A plate side penetration hole 26c which enables proper elastic deformation is formed at the plate 26. A discoid part 22a which is disposed overlapping with the plate side through hole 26c when viewed in a rotary shaft direction is provided at the inner hub 22. The structure prevents foreign objects from entering into the power transmission device through the plate side through hole 26c without increasing the number of components.