A method for knitting a knitted fabric of, when knitting a first knitted fabric portion with a first needle bed and knitting a second knitted fabric portion with a second needle bed using a flat knitting machine including the first needle bed and the second needle bed disposed opposite to each other, connecting an open portion of the knitted fabric portions (11, 12) formed at an end in a knitting width direction of the first knitted fabric portion and the second knitted fabric portion; characterized in that a line (Y1, Y2) different from a knitting yarn configuring the first knitted fabric portion and the second knitted fabric portion is used for connecting the open portion; the method comprising: assuming that a line feeder (8,9) arranged on the first needle bed side, of a plurality of line feeders (8,9) arranged in the flat knitting machine to supply the line (Y1, Y2), is a near side line feeder and a line feeder arranged on the second needle bed side with respect to the near side line feeder is a far side line feeder, a process α of moving the far side line feeder toward the open portion and carrying out an inlay knitting of interweaving a first line supplied from the far side line feeder into the first knitted fabric portion; a process β of moving the near side line feeder toward the open portion and carrying out an inlay knitting of interweaving a second line supplied from the near side line feeder into the second knitted fabric portion, and making the second line intersect the first line on the open portion side; a process γ of moving the far side line feeder toward the side away from the open portion and carrying out an inlay knitting of interweaving the first line into the first knitted fabric portion, and obtaining a state in which the first line is entwined around the second line and turned back; and a process δ of moving the near side line feeder toward the side away from the open portion and carrying out an inlay knitting of interweaving the second line into the second knitted fabric portion, and entwining a turn-back end of the first line and a turn-back end of the second line. assuming that a line feeder (8,9) arranged on the first needle bed side, of a plurality of line feeders (8,9) arranged in the flat knitting machine to supply the line (Y1, Y2), is a near side line feeder and a line feeder arranged on the second needle bed side with respect to the near side line feeder is a far side line feeder, a process α of moving the far side line feeder toward the open portion and carrying out an inlay knitting of interweaving a first line supplied from the far side line feeder into the first knitted fabric portion; a process β of moving the near side line feeder toward the open portion and carrying out an inlay knitting of interweaving a second line supplied from the near side line feeder into the second knitted fabric portion, and making the second line intersect the first line on the open portion side; a process γ of moving the far side line feeder toward the side away from the open portion and carrying out an inlay knitting of interweaving the first line into the first knitted fabric portion, and obtaining a state in which the first line is entwined around the second line and turned back; and a process δ of moving the near side line feeder toward the side away from the open portion and carrying out an inlay knitting of interweaving the second line into the second knitted fabric portion, and entwining a turn-back end of the first line and a turn-back end of the second line.