In a massage machine, a pair of rotatable shafts are mounted to extend through a top plate of a housing, and a pair of kneading balls are loosely fitted respectively to the top ends of the shafts. The shafts include oblique portions such that the kneading balls are rotated eccentrically to provide an oscillating motion. Cover pieces having spherical surfaces corresponding to the oscillating traces of the kneading balls are mounted about the rotatable shafts and interposed in a gap formed in the top plate of the housing. The kneading balls can be oscillated so that portions thereof circulate along the outer surfaces of the cover pieces. A vibration plate can be supported above the top plate by an elastic support leg, such that the massage machine can provide a kneading effect and a vibration effect simultaneously.
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