The present invention is related to an auto-return apparatus of a glass door, comprising a clamping base, a damper and a misalignment adjuster. The clamping base is secured onto the glass door and comprises a securing axle. The securing axle comprises an eccentric cam and the damper is received within the clamping base and abuts the eccentric cam of the securing axle to provide resisting force for door opening and closing. The misalignment adjuster comprises a moving plate and a securing means. The moving plate comprises a long slot provided for the securing means to pass therethrough and a mounting slot provided for the securing axle to be connected thereto such that the moving plate moves together with the clamping base along the extending direction of the long slot and relative to the securing means in order to achieve the objective of adjusting misalignment of the glass door.