A massager has a base, a motor assembly mounted on the base and having a worm shaft extending out of the motor, a transmission assembly including a transmission axle, a linking gear to mate with the worm gear, two secondary gears to drive two horizontal gears of a rubbing assembly and two pairs of kneading assemblies being respectively provided on opposite sides of the central seat to wabble when the transmission axle is rotated. Therefore, rotation of the rubbing assembly and wobbling movement of the kneading assembly are able to provide two different massaging effects to the user.