A first group comprising a plurality of terminals 2a arranged to align the distal ends and a second group comprising a plurality of terminals similarly arranged to align the distal ends such that the distal ends of each of the terminals 2b of the second group are disposed so as to alternate with the distal ends of each terminal 2a of the first group and to have their proximal ends anchored in a housing 3, and in this housing 3 an insertion hole 8 is formed in which the end of a flat cable C abuts the distal ends of each terminal 2a and 2b of the first group and second group, a plate 4 is interposed between the end of the flat cable C inserted into the insertion hole 8 and the terminals 2a and 2b of the first group and second group, and furthermore, in the housing 3 a long hole 11 is formed so that by displacing the plate 4, each terminal 2a and 2b of the first and second groups is flexibly deformed to separate from the flat cable C.