Abstract: A connector for a heavy current substrate in which a power source wire for passing the heavy current is connected to a substrate comprises a male terminal which is flexibly formed by a pair of side walls to be directly attached to the substrate and a base wall so that the section thereof may be generally U-shaped, a female terminal which is flexibly formed so as to be integrated with a pair of elastic side walls for holding the male terminal therebetween and a base wall in which a connecting portion to be connected to the power source wire is extended, and an insulating cover which is flexibly formed so as to be integrated with a pair of elastic side walls for covering and holding the female terminal therebetween and a base wall. The power source wire can be easily connected to the substrate.