An ultra-thin massaging core includes a housing having two supporting bases, and a kneading massage mechanism including a kneading rotary shaft, a kneading drive device and two partial pendulum type kneading massage members. Ends of the kneading rotary shaft are mounted on the supporting bases. The kneading massage members are close to the ends of the kneading rotary shaft. The kneading drive device includes a kneading motor and a kneading speed reducer. A recessed accommodation space is formed between the supporting bases. The kneading motor is provided on the accommodation space. The kneading rotary shaft is located above the kneading motor, and the two are perpendicularly staggered. A first output end of an output shaft of the kneading motor is connected with the kneading rotary shaft through the kneading speed reducer in a transmission mode. The kneading speed reducer has a U-shaped transmission structure and is small in size.
