The flexible printed circuit board includes a base material with a connection terminal and a signal wiring formed thereon, a first cover layer disposed on a first side of the base material, and a second cover layer disposed on a second side different from the first side. The display panel is connected to the connection terminal. The first cover layer is spaced from an end portion of the display panel by a gap of a predetermined size thereby leaving at least one of the connection terminal and the signal wiring exposed. The second cover layer overlaps with the gap in a planar view. A second end portion of the second cover layer is disposed on an opposite side the display panel. A shape of the second end portion is formed to be wavy or concavo-convex including crests and troughs.