Has an object of providing a crimp terminal, a connection structural body, and a method for producing the crimp terminal, which has a conducting function with certainty, with no galvanic corrosion occurring due to an electric wire and the terminal formed of different metal materials. A crimp terminal 1 includes a box section, and a pressure-bonding section including a wire barrel section and an insulation barrel section, which are provided in this order. The crimp terminal is formed of a metal plate which is formed of a copper alloy having a higher potential than aluminum used to form core wires of an insulated wire which is to be pressure-bonded by the pressure-bonding section. The crimp terminal 1 includes, in at least a part thereof, a resin cover section for covering a surface of the metal plate with a resin.