To provide a place card or the like to be displayed on a table for designating a seat at an event such as a meeting and a wedding reception, and a handy display medium placed on a small plane such as a table for the advertisement of a commercial product or the like.

A desktop display device is so constituted that: a hollow three-dimensional object is formed of a bottom face and a side face, or a bottom face and a side face and a top face; an opening is formed on the side face or on the top face; the bottom face is formed into a downward-convex curved face; and a weight is provided inside the three-dimensional object so that the load is applied on the central part of the bottom face. When a commercial product itself is made to function as the whole or a part of the weight and is detachably attached, it can be used as a small gift or a trade sample for takeout.