The invention provides a seam structure for fabric and a sewing method which are aesthetically superior and by which pieces of fabric can be sewn together smoothly, without a sewn-on portion protruding at the reverse surface of a garment that comes in contact with the skin, and without fabric edges being exposed at the front surface of the garment.On the upper face of one piece of fabric 2, there extends, along an edge 2a of the fabric, a stitch 5 that is formed as a result of a part of a needle thread 6 passing through the fabric to reach a lower face thereof through stitch holes 4 that are provided at regular intervals; on an upper face of another piece of fabric 3, there are arrayed, along an edge 3a of the fabric, a plurality of rings 7 that are formed as a result of protrusion of an annular leading end of the needle thread 6 having passed through the stitch holes 4 of the one piece of fabric 2 and through the lower faces of the two pieces of fabric; and a first looper thread 8, which runs in a zigzagging manner on the fabric upper faces towards the other piece of fabric 3 so as to entwine two needle threads that pass through the stitch holes 4 of the one piece of fabric 2, and the rings 7 that protrude beyond the other piece of fabric 3, are linked by a second looper thread 9, to yield a seam structure for fabric in which the two pieces of fabric are joined in a state where respective edges thereof are connected to each other.