A sewing machine is provided. The sewing machine includes a needle, a feed dog which feeds a workpiece in a feeding direction, a stitching motor which vertically moves the needle, a needle swinging motor which swings the needle in a direction orthogonal to the feeding direction, a memory in which basic coordinate data of basic buttonhole stitches having a basic stitching width is stored, an input device from which a stitching width is input, and a control device which creates a modified coordinate data based on the basic coordinate data and the stitching width input from the input device, and controls the stitching motor and the needle swinging motor based on the modified coordinate data to form buttonhole stitches having the stitching width input from the input device.