A device for varying a shape of a flexible display panel, the device comprising: a variable case configured to allow a flexible display panel to be installed therein, a shape of the variable case being varied to vary a shape of the display panel; and a driving unit installed at the rear of the variable case and configured to drive the variable case so as to vary the shape of variable case, wherein the variable case comprises: a first curved surface receiving portion configured to fix one end of the display panel in a state of being bent in a curved shape; a second curved surface receiving portion configured to fix the other end of the display panel in a state of being bent in a curved shape so as to constitute a single curved surface together with the one end of the display panel; and a hinge portion configured to turnably connect the first curved surface receiving portion and the second curved surface receiving portion to each other; and wherein the hinge portion, the first curved surface receiving portion, and the second curved surface receiving portion are configured to be pushed and pulled by the driving unit in order to vary the shape of the variable case,thereby varying the shape of the flexible display panel between having a single curved surface and having a plurality of curved surfaces. a variable case configured to allow a flexible display panel to be installed therein, a shape of the variable case being varied to vary a shape of the display panel; and a driving unit installed at the rear of the variable case and configured to drive the variable case so as to vary the shape of variable case, wherein the variable case comprises: a first curved surface receiving portion configured to fix one end of the display panel in a state of being bent in a curved shape; a second curved surface receiving portion configured to fix the other end of the display panel in a state of being bent in a curved shape so as to constitute a single curved surface together with the one end of the display panel; and a hinge portion configured to turnably connect the first curved surface receiving portion and the second curved surface receiving portion to each other; and wherein the hinge portion, the first curved surface receiving portion, and the second curved surface receiving portion are configured to be pushed and pulled by the driving unit in order to vary the shape of the variable case,thereby varying the shape of the flexible display panel between having a single curved surface and having a plurality of curved surfaces. a first curved surface receiving portion configured to fix one end of the display panel in a state of being bent in a curved shape; a second curved surface receiving portion configured to fix the other end of the display panel in a state of being bent in a curved shape so as to constitute a single curved surface together with the one end of the display panel; and a hinge portion configured to turnably connect the first curved surface receiving portion and the second curved surface receiving portion to each other; and wherein the hinge portion, the first curved surface receiving portion, and the second curved surface receiving portion are configured to be pushed and pulled by the driving unit in order to vary the shape of the variable case,thereby varying the shape of the flexible display panel between having a single curved surface and having a plurality of curved surfaces.