The utility model relates to a contactless smart card strip and includes a metal underplate in the molding area and a contact piece around the metal underplate. The utility model is characterized in that the contact piece has an arc concavo-convex structure to increase the pull and binding force of the single molding. The technic proposal can considerably enhance the binding force between the contact piece and the molding compound of the finished product. For instance, the contact point falls apart under a few hundreds grams of pressure when measured with a tension meter when a metal strip is molded by adopting the existing technology; while the strip of the utility model can tolerate several times of pulling force before the contact point falls apart. Furthermore, when the utility model becomes finished product after the following INLAY (sandwich layer) and lamination procedures, the rate of finished products and the reliability can be considerably improved.