A turnover device of a liquid crystal panel which comprises: a panel holding portion including a base, a panel face supporting portion having plural pairs of panel face touching portions to support both panel faces of a liquid crystal panel, a supporting arm of a panel long edge having a long edge touching portion to support a long edge of the panel, and a supporting arm of a panel short edge having a short edge touching portion to support a short edge of the panel; and a driving portion including a rotation shift to form a right angle with a bisector to divide an angle formed by the long edge touching portion and the short edge touching portion, and an actuator for turnover to rotate and drive the rotation shaft.