Provided is a connector assembly capable of suppressing temperature rise in a bus bar during energization. The connector assembly of the present invention includes a connector portion having an insertion port, and a bus bar portion having a bus bar, and the bus bar includes a first connection part, a second connection part extending in an opposite direction from the first connection part along the first direction, and a joint portion joining the first connection part and the second connection part. The width of the joint portion is larger than that of each of the first connection part and the second connection part in a range from one end to another end of the joint portion, and a distance from the one end to the another end of the joint portion is larger than the width of each of the first connection part and the second connection part.