This invention discloses a three-dimensional inflatable card including a card body having a containing space defined therein, an opening formed on each of two corresponding sides of the containing space, and a movable portion disposed on the card body at a position corresponding to a side of the containing space; an airbag adhered on the card body within the containing space, and containing a reacting powder and an acid solution pack; and a protective ring disposed around the periphery of the airbag, and having a thickness sufficient to contain the acid solution pack; wherein an acid solution in the acid solution pack is able to chemically react with the reacting powder to produce gas for enabling the airbag to expand to a predetermined volume, break the movable portion, and extend to the outside of the containing space, so as to form a three-dimensional inflatable object on the card body.