A sewing machine that sews a work cloth being moved by a user includes a detection device that detects the work cloth, a movement calculation device that calculates movement data of the work cloth, a movement data storage device that stores the movement data, a movement data creation device that causes the detection device and the movement calculation device to respectively detect the work cloth and calculate the movement data for each stitch, and that stores the movement data into the movement data storage device, a line segment specification device that specifies a line segment based on the movement data, a determination device that determines whether a stitch to be formed next will overlap with an already formed stitch corresponding to the specified line segment, and an error control device that performs an error correction operation based on a determination result.