A connector (11, 11A) adapted to be connected to a flexible conductor, the connector comprising: a pushing member (14, 61) having a projection (15, 31, 41, 51); and a contact made of a conductive material and having a projection accommodating portion of recess shape into which the projection is to be inserted, wherein the projection (15, 31, 41, 51) includes: a protruding portion (15A, 31A, 41A) that is situated in a lateral surface of the projection with protruding from the lateral surface of the projection and approaches an inner surface of the projection accommodating portion when the projection is inserted into the projection accommodating portion; and a gap forming portion (15B, 31B, 41B) that is situated in the lateral surface of the projection around the protruding portion and forms a predetermined gap between the gap forming portion and the inner surface of the projection accommodating portion when the projection is inserted into the projection accommodating portion, the predetermined gap being wider than a distance between the protruding portion and the inner surface of the projection accommodating portion, and wherein when the projection (15, 31, 41, 51) of the pushing member is inserted in the projection accommodating portion of the contact together with the flexible conductor with the flexible conductor being sandwiched between the projection and the projection accommodating portion of the contact such that the projection of the pushing member is covered by the flexible conductor, the protruding portion (15A, 31A, 41A) of the projection is configured to press the flexible conductor against the inner surface of the projection accommodating portion to contact the flexible conductor to the inner surface of the projection accommodating portion, and a redundant portion of the flexible conductor generated upon being inserted into the projection accommodating portion is configured to be received in the predetermined gap, characterized in that the projection (15, 31, 41, 51) is in a shape of a cylindrical column having a central axis and includes a plurality of the protruding portions (15A, 31A, 41A) arranged at equal intervals in a circumferential direction of the projection and a plurality of the gap forming portions (15B, 31B, 41B) each formed between every adjacent two of the plurality of the protruding portions, wherein the inner surface of the projection accommodating portion of the contact has a shape of a cylindrical tube. a pushing member (14, 61) having a projection (15, 31, 41, 51); and a contact made of a conductive material and having a projection accommodating portion of recess shape into which the projection is to be inserted, wherein the projection (15, 31, 41, 51) includes: a protruding portion (15A, 31A, 41A) that is situated in a lateral surface of the projection with protruding from the lateral surface of the projection and approaches an inner surface of the projection accommodating portion when the projection is inserted into the projection accommodating portion; and a gap forming portion (15B, 31B, 41B) that is situated in the lateral surface of the projection around the protruding portion and forms a predetermined gap between the gap forming portion and the inner surface of the projection accommodating portion when the projection is inserted into the projection accommodating portion, the predetermined gap being wider than a distance between the protruding portion and the inner surface of the projection accommodating portion, and wherein when the projection (15, 31, 41, 51) of the pushing member is inserted in the projection accommodating portion of the contact together with the flexible conductor with the flexible conductor being sandwiched between the projection and the projection accommodating portion of the contact such that the projection of the pushing member is covered by the flexible conductor, the protruding portion (15A, 31A, 41A) of the projection is configured to press the flexible conductor against the inner surface of the projection accommodating portion to contact the flexible conductor to the inner surface of the projection accommodating portion, and a redundant portion of the flexible conductor generated upon being inserted into the projection accommodating portion is configured to be received in the predetermined gap, characterized in that the projection (15, 31, 41, 51) is in a shape of a cylindrical column having a central axis and includes a plurality of the protruding portions (15A, 31A, 41A) arranged at equal intervals in a circumferential direction of the projection and a plurality of the gap forming portions (15B, 31B, 41B) each formed between every adjacent two of the plurality of the protruding portions,