A connector, comprising: An insulating housing including a first split housing, a second split housing and connecting portions (46, 47) in an integrally molded manner, wherein the first split housing and the second split housing are capable of being fitted together and are connected to each other by the connecting portions (46, 47); a first outer peripheral wall and a second outer peripheral wall to form outer peripheral edge portions of said first split housing and said second split housing, respectively; a contact located inside said first outer peripheral wall and having an electrically connecting portion (53, 55); and wherein said second split housing is configured to hold a cable (60, 65) and said contact is configured to be electrically connected to said cable (60, 65) in a state where said first split housing and said second split housing are fitted together; a first filler and a second filler provided respectively to said first split housing and said second split housing, characterized in that in an extended state of the insulating housing in which the first split housing and the second split housing are not fitted together: said entire first outer peripheral wall is located on a fitting side with respect to said connecting portion (46, 47) in a fitting direction in which said first split housing and said second split housing are fitted to each other; and said entire second outer peripheral wall is located on an opposite side of said fitting side with respect to said connecting portion (46, 47) in said fitting direction; wherein when said first split housing and said second split housing are fitted together, said first filler and said second filler are crushed and integrated to each other around said contact, and said entire second outer peripheral wall is located outside said first outer peripheral wall. An insulating housing including a first split housing, a second split housing and connecting portions (46, 47) in an integrally molded manner, wherein the first split housing and the second split housing are capable of being fitted together and are connected to each other by the connecting portions (46, 47); a first outer peripheral wall and a second outer peripheral wall to form outer peripheral edge portions of said first split housing and said second split housing, respectively; a contact located inside said first outer peripheral wall and having an electrically connecting portion (53, 55); and wherein said second split housing is configured to hold a cable (60, 65) and said contact is configured to be electrically connected to said cable (60, 65) in a state where said first split housing and said second split housing are fitted together; a first filler and a second filler provided respectively to said first split housing and said second split housing, characterized in that in an extended state of the insulating housing in which the first split housing and the second split housing are not fitted together: said entire first outer peripheral wall is located on a fitting side with respect to said connecting portion (46, 47) in a fitting direction in which said first split housing and said second split housing are fitted to each other; and said entire second outer peripheral wall is located on an opposite side of said fitting side with respect to said connecting portion (46, 47) in said fitting direction; wherein when said first split housing and said second split housing are fitted together, said first filler and said second filler are crushed and integrated to each other around said contact, and said entire second outer peripheral wall is located outside said first outer peripheral wall. said entire first outer peripheral wall is located on a fitting side with respect to said connecting portion (46, 47) in a fitting direction in which said first split housing and said second split housing are fitted to each other; and said entire second outer peripheral wall is located on an opposite side of said fitting side with respect to said connecting portion (46, 47) in said fitting direction; wherein when said first split housing and said second split housing are fitted together, said first filler and said second filler are crushed and integrated to each other around said contact, and said entire second outer peripheral wall is located outside said first outer peripheral wall.