A connector terminal includes a top side contact portion which makes contact with a top surface of a counter connector terminal and three linear bottom side contact portions each of which extends along a fitting axis and makes contact with a bottom surface of the counter connector terminal, the three bottom side contact portions being arranged such that centers of themselves form an isosceles triangle, the top side contact portion being, when viewed in a direction perpendicular to the top surface of the counter connector terminal in a fitted state, positioned in a straight line that lies between a base and a vertex facing the base in the triangle and extends parallel to the base in a manner that a ratio of a distance from the base to a distance from the vertex is 1:2.