A support-type display device (100) of the present invention comprises: a fixing member (110) which is fixed to a support (200); a display panel (120) which is fixed to one side of the fixing member (110), and has a flexible form that can be rolled and unrolled; and shape maintenance means (130) which are respectively installed along upper and lower parts of the display panel (120), and roll the display panel (120) or unroll in the shape of a flat board to maintain the rolled or unrolled state if an external force is applied. The present invention is installed on an outdoor support and is used for advertising and/or prevention, wherein a flexible display panel which can be rolled and unrolled is used such that the display panel is unrolled only when necessary, whereby the invention can be used for advertising and/or prevention.