PROBLEM TO BE SOLVED: To provide a sewing guide jig which prevents double stitches from meandering.SOLUTION: A sewing guide jig 1, which is a jig used by being attached to a sewing machine 80 when at least two fabrics 90 are sewn together and seam allowance portions 92 of the respective fabrics 90 are then sewn to main body portions 91 of the fabrics 90 positioned at one side and the other side of a stitch 90a, includes a guide part 30 positioned on an upper side of a sewing machine table 81, and having a tapered upper side edge 31 entering between the seam allowance portions 92 of the respective fabrics 90. A tip portion of the guide part 30 has a side view shape along a side view shape of a tip portion of a presser foot 82 of the sewing machine 80.