Electrical connector having contacts with contact portions arranged in three contact portion tiers

An electrical connector comprising an insulator and a plurality of contacts arranged in line in a width direction of said insulator;

• wherein said contacts have a contact portion adapted to be detachably connected to a first connection object and a terminal portion adapted to be fixedly connected to a second connection object, respectively;
• said contact portions of said contacts are arranged in first, second, and third contact portion tiers superposed in a vertical direction perpendicular to the width direction of said insulator;
• said terminal portions of the contacts having the contact portions belonging to the first contact portion tier is arranged in a first terminal portion tier of the first and second terminal portion tiers superposed in the vertical direction of said insulator;
• said terminal portions of the contacts having the contact portions belonging to the third contact portion tier is arranged in said second terminal portion tier;
• and
• said terminal portions of the contacts having the contact portions belonging to the second contact portion tier are arranged so as to be alternately allocated to said first terminal portion tier and said second terminal portion tier.