A flexible display module includes a first light-transmissive layer and a first display layer. The first light-transmissive layer includes a display surface. The first light-transmissive layer has a first width in a second direction. The first display layer is disposed below the first light-transmissive layer. The first display layer has a second width in the second direction. The first display layer includes a circuit layer. The flexible display module is configured to be bent along an axis, the axis extends along a first direction, the first direction is perpendicular to the second direction, and the first width is greater than the second width. A line width of the circuit layer more close to a periphery of the display surface is less than a line width of the circuit layer more close to an inner area of the display surface.