The invention relates to the technical field of display and provides a liquid crystal display device. The liquid crystal display device comprises a display assembly and a chip on film, wherein the display assembly is provided with a display assembly groove and a light source unit, the light source unit is arranged at one end of the display assembly groove of the display assembly, the chip on filmis connected with the display assembly, is arranged on the back side of the display assembly and is arranged at the end, provided with the display assembly groove, of the display assembly, and a groove for the chip on film is formed in the position, corresponding to the display assembly groove, of the chip on film. The light source unit is arranged at the end, provided with the display assembly groove, of the display assembly, and meanwhile the chip on film is arranged at the end, provided with display assembly groove, of the display assembly, so that the chip on film and the light source unitdo not occupy the bottom space of the display assembly. Therefore, no space needs to be reserved at the bottom of the display device, the width of a bottom frame of the liquid crystal display deviceis effectively decreased, accordingly the display zone of the liquid crystal display device is larger, and a user has better use experience.