To provide a driven-side pulley for a V-belt type automatic transmission device whose vibration is suppressed by reducing runout during the rotating operation of clutch weights without complicating a mechanism.

The driven-side pulley comprises a fixed pulley half 1, a movable pulley half 2 having a movable-side boss 22 for sliding along the axial direction of a fixed-side boss 12 of the fixed pulley half 1, a clutch plate 4 which is mounted at the axial end of the fixed side boss 12 and to which a plurality of the clutch weights 5 are pivotally connected via a pivotal pin 42, a clutch outer 7 which the clutch weights 5 contact with by a centrifugal force, a supporting plate 6 having a supporting hole 62 through which the tip of the pivotal pin 42 is inserted, and a compression coil spring 9. The compression coil spring 9 is mounted between the back side of the movable pulley half 2 and the supporting plate 6 in a mutually resilient manner.