Intermediate circuit board and intermediate electrical connector

An intermediate circuit board provided in an intermediate electrical connector establishing intermediate connections between two counterpart connect bodies, the board having

• a plate-shaped substrate, and,
• on a major face of the substrate, a plurality of signal transmission line pairs for differential signal transmission extending from one end of the substrate, to which one counterpart connect body is connected, continuously to an other end of the substrate to which the other counterpart connect body is connected, wherein:
• the substrate has a fiber cloth formed by braiding a plurality of fibers used to reinforce the substrate in a mesh pattern, and a plate-like member made of plastic having the fiber cloth embedded therein;
• the plurality of signal transmission line pairs have straight pairs and cross pairs disposed in an alternating manner;
• the straight pairs are formed of two signal transmission lines extending in parallel to each other, or two signal transmission lines having intersection portions in which intersection takes place without contact at an even number of locations in a longitudinal direction of the straight pairs;
• the cross pairs are formed of two signal transmission lines having intersection portions in which intersection takes place without contact at an odd number of locations in a longitudinal direction of the cross pairs;
• signal connection portions of the straight pairs and signal connection portions of the cross pairs extend parallel to a longitudinal direction of the intermediate circuit board, and ends of the signal connection portions are arranged so that they are parallel to top or bottom edges of the intermediate circuit board;
• and
• the straight pairs and cross pairs, when viewed in a through-thickness direction of the substrate, have at least one longitudinal portion of said straight pairs and cross pairs formed extending inclined at an angle relative to the fibers of the fiber cloth.