A quick expander for quickly transversely or sagitally expanding a human palate, while stabilizing applied pressing forces, characterized in that said expander comprises a central body including a pair of mutually movable blocks therefrom respectively extend a pair of right palate bars and a pair of left palate bars, each said bar pair having respective bar end portions which are respectively coupled to a right dental element and a left dental element, said expander further comprises a single driving bar operating between said blocks so as to reduce an overall size of said expander.
