The metal terminals are a first terminal, and a second terminal mated with the first terminal, the first terminal has a first main body portion, a first contact portion, and a first lock portion, the second terminal has a second main body portion, a second contact portion contacting the first contact portion, and a second lock portion locking the first lock portion. The first lock portion includes a first engaging portion arranged on a surface of the first main body portion, and the second lock portion including a pair of second engaging portions arranged on opposing surfaces of the second main body portions.