Provided is a connector which includes: a plurality of terminals; additional members configured to maintain a state of being mated with a counterpart connector; and a housing, in which the additional members each include a first lock portion and second lock portions, the housing includes first side wall portions each holding the first lock portion, and second side wall portions each holding the second lock portions, the first lock portion includes a curved surface protruding relative to a front surface of the first side wall portion, the second lock portion includes a curved surface protruding relative to a front surface of the second side wall portion, the first lock portion is divided in a direction orthogonal to the first side wall portion, and the second lock portion extends in a direction orthogonal to the first lock portion, on each side of the first lock portion.