Connector configured to take a primary locking state and a secondary locking state

A connector comprising:

• a terminal that includes a box-like portion, into which a mating terminal is inserted and connected, and is attached to an end of an electric wire;
• a housing that has an accommodating hole accommodating the box-like portion;
• and
• a retainer that is attached to the housing in a manner to be displaceable in a crossing direction, the crossing direction crossing with a direction in which the box-like portion is inserted into the accommodating hole, and can be positioned on a first position and a second position, wherein
• when mutually-opposing inner surfaces of the accommodating hole are defined as an upper surface and a lower surface, a pressing piece is formed on the upper surface, the pressing piece cantilevering to protrude toward the lower surface, and a protrusion is formed on the lower surface, the protrusion protruding toward the upper surface,
• the retainer includes a protrusion portion that protrudes on extension of the accommodating hole,
• when the retainer is positioned on the first position, the box-like portion is allowed to be inserted into the accommodating hole without displacement of the retainer and the box-like portion inserted in the accommodating hole is pushed by the pressing piece and displaced in the crossing direction so as to make a step portion, the step portion being formed on the box-like portion, be caught by the protrusion and retained and a rear end of the box-like portion be caught by the protrusion portion and retained, where a primary locking state is produced, and
• the retainer is displaced from the first position to the second position so as to increase hooking between the protrusion portion and the rear end of the box-like portion, where a secondary locking state is produced.