An improved card-reading device comprises an input module, a message display panel, a pair of engaging elements, a shielding structure and an antenna module. The shielding structure is pivotally installed between the pair of engaging elements, such that the shielding structure can be swung to provide a shielding effect to a specific position of the card-reading device. The antenna module is installed inside the shielding structure and provided for sensing an object containing a specific tag.