1. A display device comprising:a display panel; and
a wiring board comprising a flexible base, a terminal electrically connected to the display panel, an IC chip, a wiring line which electrically connects the terminal and the IC chip,
the base comprising a first surface on which the IC chip and the terminal are provided, a second surface on an opposite side to the first surface, and a concavity in the second surface between the IC chip and the terminal,
the wiring board is mounted on the display panel and is bent so that the wiring board is opposed to a rear surface side of the display panel, and
the concavity is provided in the portion of the wiring board which is bent.