A flexible display module according to an embodiment of the present invention includes a display panel, a touch sensor layer disposed on the display panel, the touch sensor layer including sensing electrodes and traces that extend from the sensing electrodes, a combining layer by which the display panel and the touch sensor layer are combined with each other, the combining layer having an elastic modulus in a range from 0.1 to 5 MPa and a moisture permeability in a range from 500 g/m2·24 hr or less, a flexible circuit board electrically connected to the traces at an end portion of the touch sensor layer, and an upper supporting structure that commonly and partially covers the flexible circuit board and the touch sensor layer. End portions of the display panel and the touch sensor layer are bent together with the upper supporting structure.