A movement device having a Stewart platform has a supporting body disposed on a horizontal plane, a movable platform, and four extensible links rotatably connected between the supporting body and the platform. The extension directions of the upper extensible links are in parallel with one another. When the movement device is in an equilibrium condition, the upper extensible links lie in a first common plane. When the movement device is in an equilibrium condition, vertical projections of the extension directions of the extensible links on a normal plane slant toward the horizontal plane the vertical projection of the extension direction of the first bottom extensible link slants toward a first direction whereas the vertical projections of the extension directions of the other three extensible links slant toward a second direction, which is opposite to the first direction.
