PURPOSE: A printed circuit board of a liquid crystal display is provided to reduce, in the adapted liquid crystal display, the difference between the amounts of thermal expansion of a TCP that is a signal transmission film and a printed circuit board. CONSTITUTION: A liquid crystal display includes an LCD panel(100) composed of a TFT substrate(104) and a color filter substrate(102) attached to the TFT substrate having a liquid crystal layer interposed between the two substrates, a multi-level printed circuit board(200) electrically connected to the LCD panel and formed of N boards laminated, and a signal transmission film(300) that electrically connects the LCD panel and the printed circuit board to each other to drive the LCD panel. At least one hole(220) is formed in M boards of the printed circuit board to reduce a difference between the amounts of thermal expansion of the signal transmission film and the printed circuit board.