A sewing machine includes a bed, a needle plate, a needle bar, a needle bar swing mechanism, a lift mechanism, an optical detecting portion, and a control portion. The lift mechanism is configured to raise and lower a presser foot. The optical detecting portion is configured to optically detect a cord guided by the guide portion, and to output data representing the cord. The control portion is configured to calculate a width of the cord based on the data output by the optical detecting portion, calculate a height position of the presser foot based on the width of the cord, and cause the lift mechanism to move the presser foot to the height position.