d and between the wefts e and a respectively more specifically the auxiliary weft a is disposed between the wefts a and b on the warps 1 and 2 in a recess formed at a location where the warp 1 extending from the bottom side running side of the weft a to the top side paper side of the weft b obliquely intersects the warp 2 extending from the top side of the weft a to the bottom side of the weft b the auxiliary weft b is disposed between the wefts c and d on the warps 3 and 4 in a recess formed at a location where the warp 3 extending from the top side of the weft c to the bottom side of the weft d obliquely intersects the warp 4 extending from the bottom side of the weft c to the top side of the weft d the auxiliary weft c is disposed between the wefts e and a on the warps 5 and 1 in a recess formed at a location where the warp 5 extending from the bottom side of the weft b to the top side of the weft a obliquely intersects the warp 1 extending from the top side of the weft e.