Electrical connector assembly

An electrical connector assembly having two counterpart connect bodies and an intermediate connector that provides intermediate electrical connections between the two counterpart connect bodies,

• at least one of the two counterpart connect bodies being a board connector mounted to a circuit board, and
• the intermediate connector, for which a direction of connection to the counterpart connect bodies is a vertical direction perpendicular to a surface of the circuit board, having one counterpart connect body, which is the board connector, connected thereto from below, while an other counterpart connect body is connected thereto from above, wherein:
• the board connector, at opposite ends in a connector width direction, has fittings that extend in a connector length direction perpendicular to both the connector width direction and the vertical direction;
• the fittings have resilient pieces that extend upwardly and are resiliently deformable in the connector width direction;
• the resilient pieces, in a top end portions thereof, have locking portions that protrude outwardly in the connector width direction;
• the intermediate connector has a housing that is capable of receiving the board connector from below;
• the housing has lateral walls extending in the connector length direction at the opposite ends in the connector width direction;
• the lateral walls have lockable portions lockingly engageable with the locking portions from below at locations corresponding to the resilient pieces in the connector length direction;
• and
• the fittings further include a locking arm portion that locks with a mating connector at a position different, in the connector length direction, from the resilient pieces that engage with the housing.