A foldable multi-display device includes plural display panels that define a large-sized screen by being disposed to contact each other at their one side ends when they are unfolded, and that are received in a panel housing when they are folded in a state where only their one side ends are exposed outside. The panel housing includes a housing body for receiving at least two display panel, a supporting portion defined by cutting a sidewall of the housing body to support the display panels, an upper cover mounted on the housing body to cover non-display regions of the display panels, and an opening defined on the housing body to allow the display panels to contact each other at their one side ends when the display panels are unfolded. The foldable multi-display device further includes a connecting device for foldably supporting the panel housing.