It is aimed to improve anti-vibration performance. A connector includes a terminal holding member made of synthetic resin for holding terminal fittings and a case made of metal for accommodating one end part of each terminal fitting by being integrated with the terminal holding member. The case includes a displacement restricting portion having an irregular shape, and the displacement restricting portion is formed on a contact surface of the case with the terminal holding member. When the case made of metal and the terminal holding member made of synthetic resin are thermally deformed, an anchoring effect by the engagement of the displacement restricting portion and the terminal holding member is achieved on the contact surface of the case with the terminal holding member to suppress relative displacements between the case and the terminal holding member.