Disclosed is an active matrix liquid crystal display device including: an active matrix liquid crystal display device of a normally black mode which includes an active matrix substrate and an opposed substrate and in which a black matrix is not provided on the opposed substrate, wherein a gap between opaque electrodes which are closely located and whose electric potentials are different from each other in a frame portion around a display area of the active matrix substrate is covered with a constant-potential transparent electrode arranged in an upper layer of the gap.