A liquid crystal display (LCD) device includes first and second substrates (110, 210, 160, 260) facing each other, each of the first and second substrates having a first substrate having a display region (DR), a non-display region (NDR), and a seal pattern region disposed in the non-display region; a protection layer (140, 240) on the first substrate and having a first seal pattern groove (144, 244) in the seal pattern region; first and second dams (176, 178) on the second substrate (160, 260) and respectively disposed at both ends of the first seal pattern groove (144, 244), the first and second dams (176, 178) configured to form a second seal pattern groove (174, 274) corresponding to the first seal pattern groove; a pixel electrode (150, 250) on the first substrate; a common electrode (166, 266) on one of the first and second substrates; a liquid crystal layer (180, 280) between the first and second substrates; and a seal pattern (190, 290) having one end inserted into the first seal pattern groove (144, 244) and the other end inserted into the second seal pattern groove (174, 274).