A damper disc assembly including torsion springs interposed between flanges formed on a central hub and side plates; characterized by that a cam freely rotatable about an axis parallel to a disc center line is provided between said internal tooth and said external tooth through a disc circumferential play, a longitudinal portion of the cam is made engage between said external tooth and said internal tooth when a torsion is produced between the inner side flange and the outer side flange, and a spring member is provided, which elastically urges the cam to such an extent that the cam longitudinal portion is kept engaged when an angular velocity at which said torsion is released is high and the portion is disengaged when the angular velocity is low.
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