Electrical connector and method for mounting electrical connector

An electrical connector comprising a plug shell,

• the plug shell including
• an accommodation portion accommodating a contact pin and a housing that holds the contact pin,
• an insertion port inserting the contact pin and the housing into the accommodation portion,
• a lid member closing the insertion port, and
• a hold mechanism holding the lid member,
• wherein the hold mechanism is equipped with a pedestal, on which the lid member is placed, and a pair of hold pieces, which hold the lid member on the pedestal by pressing the lid member onto the pedestal,
• wherein the lid member has a central portion and end portions which are positioned on both sides of the central portion, and
• wherein the pair of hold pieces press the end portions of the lid member toward the pedestal, so that thereby a stress that urges the end portions of the lid member to become distant from the pedestal is generated in the lid member.