A connector includes signal contacts and predetermined contacts maintained at predetermined voltage levels. Each contact has a horizontal portion, an intersecting portion extending along a direction intersecting with the horizontal portion and a coupling portion coupling the horizontal portion and the intersecting portion to each other. The contacts include a first contact group made up of the two predetermined contacts and one differential pair of the two signal contacts. In the first contact group, a size of the coupling portion of each of the predetermined contacts in the pitch direction is larger than another size of the coupling portion of each of the signal contacts in the pitch direction, and a size of the intersecting portion of each of the predetermined contacts in the pitch direction is larger than another size of the intersecting portion of each of the signal contacts in the pitch direction.