A connector includes a plurality of contacts made of metal material and arranged in an arrangement direction orthogonal to a fitting direction, an insulator made of insulating resin material and holding the plurality of contacts, and a reinforcement terminal made of metal material and attached to an end portion of the insulator in the arrangement direction, the insulator including a fitting portion extending along the arrangement direction and projecting in the fitting direction for fitting to a portion to be fitted of the counter connector, the reinforcement terminal including a terminal accommodating portion of recess shape for accommodating a reinforcement terminal of the counter connector, and a wall portion facing an end portion of the fitting portion in the arrangement direction across the terminal accommodating portion, the reinforcement terminal including a resin material flow passage penetrating the wall portion and reaching the end portion of the fitting portion.