To improve workability and maintain an assembled state.

Both terminal main bodies 11, 51 include locking holes 18, 58 and locking protrusions 27, 67 maintaining both terminal fittings 10, 50 in a separation-regulated state. The terminal main bodies 11, 51 has progressing grooves 22, 62 of the locking protrusions 27, 67 extended along a deforming direction of the terminal main bodies 11, 51, with one end opened as a receiving hole 24 of the locking protrusions 27, 67, and the other end looking into the locking holes 18, 58 by partially notching locking edge parts 26, 66 of the locking holes 18, 58 leaving a locking margin with the locking protrusions 27, 67.