Electrical connector

An electrical connector comprising:

• an insulating housing;
• contacts that are accommodated in this housing;
• and
• a retainer that is inserted from the front surface of the housing, and that is locked to the housing in a temporary locking position that allows the insertion of the contacts into the housing and in a main locking position that ensures that the contacts are prevented from slipping out of the housing,
• the retainer having a front plate that has contact passage holes, and locking arms that extend rearward from the upper and lower ends of the front plate, wherein
• the retainer comprises a strip that protrudes rearward from the center of the front plate on a back surface thereof, and also has a recessed groove that extends in the center of the front plate on a front surface thereof and in a position corresponding to the strip, and
• the housing has a recessed groove that mates with the strip when the retainer is in the main locking position.