A connector configured to be connected to a cable, wherein: the connector comprises a housing, a contact (30, 40) and a locator configured to position the cable; the housing holds the contact and the locator; the contact has a connection portion; the connection portion is connectable to the cable, which is moved along a front-rear direction, through insulation displacement connection; the locator has a front-end surface, a first surface and a second surface and is formed with a positioning groove; the front-end surface is located at a front end of the locator; the first surface and the second surface are located at opposite sides of the locator, respectively, in an upper-lower direction perpendicular to the front-rear direction; the positioning groove has a front groove, a rear groove and a coupling groove; the front groove is recessed rearward from the front-end surface and extends from the first surface to the coupling groove along the upper-lower direction; the coupling groove opens forward and opens toward the second surface in the upper-lower direction; when the locator positions the cable, the front groove receives a front regulated portion which is a part of the cable, and the rear groove receives a rear regulated portion which is another part of the cable; the front groove, which receives the front regulated portion, regulates a rearward movement of the front regulated portion and regulates a movement of the front regulated portion in a lateral direction perpendicular to both the front-rear direction and the upper-lower direction; and the rear groove, which receives the rear regulated portion, regulates a movement of the rear regulated portion toward the first surface and regulates another movement of the rear regulated portion in the lateral direction, characterized in that the rear groove is recessed from the second surface toward the first surface along the upper-lower direction and extends rearward from the coupling groove to open rearward. the connector comprises a housing, a contact (30, 40) and a locator configured to position the cable; the housing holds the contact and the locator; the contact has a connection portion; the connection portion is connectable to the cable, which is moved along a front-rear direction, through insulation displacement connection; the locator has a front-end surface, a first surface and a second surface and is formed with a positioning groove; the front-end surface is located at a front end of the locator; the first surface and the second surface are located at opposite sides of the locator, respectively, in an upper-lower direction perpendicular to the front-rear direction; the positioning groove has a front groove, a rear groove and a coupling groove; the front groove is recessed rearward from the front-end surface and extends from the first surface to the coupling groove along the upper-lower direction; the coupling groove opens forward and opens toward the second surface in the upper-lower direction; when the locator positions the cable, the front groove receives a front regulated portion which is a part of the cable, and the rear groove receives a rear regulated portion which is another part of the cable; the front groove, which receives the front regulated portion, regulates a rearward movement of the front regulated portion and regulates a movement of the front regulated portion in a lateral direction perpendicular to both the front-rear direction and the upper-lower direction; and the rear groove, which receives the rear regulated portion, regulates a movement of the rear regulated portion toward the first surface and regulates another movement of the rear regulated portion in the lateral direction, characterized in that the rear groove is recessed from the second surface toward the first surface along the upper-lower direction and extends rearward from the coupling groove to open rearward.