An automatic massage apparatus may include a main body, a massaging unit, at least two first belts and at least two second belts. The main body has two positioning units, a cover, a long guiding groove. A rail is disposed underneath the cover and aligned with the top surface of the main body. The guiding rail is hollow to provide a space for a driving unit of a massaging unit, and a long groove is formed on both sides of the guide rail. The driving unit has a driving shaft extending towards both sides of the driving unit. When the driving unit is disposed into the space of the guiding rail, the long groove is used for the extension of the driving shaft, so the driving unit can be connected to an eccentric massaging body through the driving shafts. Furthermore, both ends of the driving shaft have a plurality of wheels disposed against the rail of the main body, and these wheels are appropriately spaced. Both sides of the massaging unit have at least a first compartment and a second compartment. One end of the first belt is secured on the first end of the positioning unit, and the other end is wrapping the driving shaft in the first compartment. Likewise, one end of the second belt is secured on the second end of the positioning unit, and the other end is wrapping the driving shaft in the second compartment.