A massager with symmetric massaging structure includes first and second casing assemblies coupled to a connection belt each and connected pivotally by first and second movable sleeves, respectively. The casing assemblies, whose included angles are adjustable, have therein power sources for driving first and second transmission members connecting with and driving first and second massaging sets to knead a users body in a fixed-point manner. The transmission members drive the tooth-guiding groove screws to advance toward the movable sleeves in a fixed-point manner, respectively. With first and second tooth-like keys, the movable sleeves engage with tooth-guiding grooves of the tooth-guiding groove screws, respectively. The tooth-guiding groove screws rotate to pull synchronously the casing assemblies toward each other or away from each other. After restoring its initial position, one said massaging set does not move together with the other massaging set until the other massaging set restores its initial position too.
