A video wall display device can include a multi-panel unit including a first display panel and a second display panel, the first display panel having a first display area adjacent to the second display panel having a second display area; a first optical member disposed adjacent to a boundary between the first display area and the second display area; and a second optical member disposed on the first optical member, across the multi-panel unit and including a tapered portion, in which the tapered portion of the second optical member is inclined from an edge of the first display area or an edge of the second display area toward the boundary between the first display area and the second display area.