Abstract: A cloth guide mechanism in a sewing machine includes a member disposed at an angle with respect to a line normal to the pulling direction of cloth and provided with a slanted portion, a guide for receiving the cloth and having passages through which the cloth passes while being flexed, an adjustable cloth positioning element having a first positioning portion disposed at an angle with respect to the cloth pulling direction and a second portion disposed in parallel to the cloth pulling direction for maintaining the distance of a seam line to be formed in the cloth from one side edge of the cloth at a constant value, and an arrangement for imparting a tension on the cloth sufficient to reduce the force which urges the side edge against the first and second portions of the positioning means as the cloth is moved along the slanted portion of the first-mentioned means and to permit the cloth to move in the pulling direction.