A flexible display apparatus includes a flexible substrate having a main area having an apex at which a first side and a second side meet, a first area that shares the first side with the main area, and a second area that shares the second side with the main area, wherein a first angle of the first area and a second angle of the second area that share the apex are acute angles, and a display unit arranged over the main area, the first area, and the second area of the flexible substrate.