Abstract: An edge trimmer guide for a sewing machine which is removably attached to a sewing machine has a head, a body and a foot. The cylindrical head is provided with an outer wall and an inner wall, both of which are formed integral with a vertical wall and are arranged concentrically to form a clearance therebetween into which a front edge of a side cover of the edge trimmer is fittable. The outer and inner walls extend horizontally in parallel to form a first and a second horizontal wall of the body respectively in such a way that a clearance is arranged therebetween into which a horizontal edge of the side cover of the trimmer is fittable. Another clearance is arranged between a slanted wall extended from the vertical wall and a depending wall of the first horizontal wall. A vertical edge of the side cover of the trimmer may be fitted into the second clearance while a guide foot is projected horizontally from the depending wall in parallel with the slanted wall toward the vertical wall of the head of the guide.