Abstract: A music doll driving mechanism which includes a music box in the body with a driving gear mounted thereon as disclosed. The driving gear includes a top cover and a bottom cover to form a container for the component parts which includes a revolving disk, a cam link mounted on the revolving disk to drive a rocking plate thereon to make reciprocal movements so as to further drive two rocker arms which are connected to both ends of the rocking plate and are driven to displace one arm of the doll separately or both, concomitantly according to the preferred design. A vertical axle is mounted on the revolving disk at the bottom, its extension axle mounted in the eccentric hole of the revolving disk, with the top end being inserted into the bottom of the doll's head portion. By this arrangement, the head and extremities of the music doll are simultaneously driven while the music box is driven to provide music.