Abstract: The invention provides a method by which a transit yarn fastening portion can be formed with a comparatively small number of steps by a flat knitting machine. The method of forming a transit yarn fastening portion is performed in a method of forming, by a flat knitting machine including a yarn carrier and two needle beds, a knit fabric having a transit yarn section in which a yarn from the yarn carrier is not knitted and forms a transit yarn portion and a knitting section in which the yarn from the yarn carrier is knitted, and includes the steps of successively forming two or more loops of the transit yarn by one of needles of that one of the needle beds which does not contribute to knitting which needle is located in the proximity of a boundary between the transit yarn section and the knitting section, and transferring the loops formed in the first step to one of needles on the other needle bed which contributes to knitting.