A flexible display includes a flexible display substrate, a first fixing part at a first side of the display substrate, and a second fixing part at a second side of the display substrate opposite to the first side. The first fixing part includes a plurality of first unit fixing parts arranged along the first side, and the second fixing part includes a plurality of second unit fixing parts arranged along the second side. A first folding part is between adjacent ones of the plurality of first unit fixing parts, and a second folding part is between adjacent ones of the plurality of second unit fixing parts. A plurality of first folding lines, each extending between the corresponding first folding part and the corresponding second folding part, are defined, and the display substrate is configured to be folded along at least one of the first folding lines.