Stacking connector

A stacking connector comprising:

• a connector main body including a substrate insertion slot which is open to a front, a substrate attaching member formed at a rear side, and a plurality of socket terminals extending from the substrate insertion slot to the substrate attaching member;
• and
• a plug substrate including a plurality of plug terminals, the plug substrate being attachable to and detachable from the substrate attaching member, the plug terminals electrically connected to the socket terminals by attaching the plug substrate to the substrate attaching member;
• wherein the substrate attaching member of the connector main body comprises a substrate sandwiching member having a sandwiching gap into which the plug substrate fits, and a projection projecting from the substrate sandwiching member into the sandwiching gap,
• the plug substrate comprises an attachment side part fitting into the sandwiching gap of the substrate sandwiching member, an insertion side member extending from the connector main body to be inserted into a substrate insertion slot of another stacking connector, and a concavity opening in both top and bottom surfaces of the plug substrate, and
• after inserting the attachment side part into the sandwiching gap of the substrate sandwiching member, by sliding the plug substrate in a direction at right angles to the insertion direction, the concavity engages with the projection and the plug substrate is attached to the connector main body in an unremovable state.