An outdoor display apparatus having a heat dissipation structure includes a first display module configured to display an image in a first direction, a second display module configured to display an image in a second direction opposite to the first direction, a housing configured to accommodate the first display module and the second display module, and having an inlet and an outlet, and a heat exchange device configured to receive heat from one of the first display module and the second display module and perform heat exchange, wherein the heat exchange device includes: a first heat exchange portion having at least one cooling passage to cool the first display module; a second heat exchange portion having at least one cooling passage to cool the second display module; and a heat exchanger configured to be selectively shared by the first heat exchange portion and the second heat exchange portion.