A lead frame as an intermediate member for forming a contact group of a connector, comprising a plurality of first leads arranged on a plane, second leads arranged on the plane so as to form a pair between the first leads, and a connecting portion connecting the first leads and the second leads on a first end side, wherein the leads of the pair of second leads are separated by a first distance on the first end side and by a second distance on a second end side opposite the first end side, the second distance being greater than the first distance,
- wherein the first leads each have a first straight portion extending from the connecting portion, a first offset portion extending obliquely from the first straight portion so as to be away from the second lead, and a second straight portion extending from the first offset portion in the same direction as the first straight portion;
- and
- wherein the first leads each have, in the second straight portion, a first bending intended portion for bending in a direction crossing the plane, and wherein the second leads each have, at a position between a portion on the second end side and the connecting portion, a second bending intended portion for bending in the direction crossing the plane.