A knitting method provides an easy-to-wear knitted tubular knitted fabric which gives little stretching feeling and exhibits high fitness upon wearing by joining at least three tubular parts. The method of a tubular knitted fabric using a flat knitting machine having at least a pair of front and back needle beds extending in a transverse direction and disposed opposite to each other in a cross direction, at least either of which is racked in the transverse direction so that loops can be transferred between the front and back needle beds comprises an operation of joining two tubular parts at a boundary of front and back knitted fabrics to form a tubular part is repeated; wherein the boundary is set so that the front knitted fabric and the back knitted fabrics are different in length in a knitting width direction immediately before joining for at least one tubular part; the tubular part in which the front and back knitted fabrics are different in length in the knitting width direction and the boundary to be joined is not positioned between the front and back needle beds is rotated so that the boundary is positioned between the front and back needle beds; and two adjacent tubular parts having the boundaries opposed to each other between the needle beds are joined while holding the boundary in between after the rotation.