A hollow needle for a tag attacher gun for attaching tags or labels to garments comprises a blade (2), made by press working of a thin metal plate, and a shank of a synthetic resin integrally secured at a rear end part of the blade (2), wherein the blade (2) includes a front end part which is of generally semicircular shape in section and is formed in an outer surface portion thereof with a resistance reducing part (4) providing by partly depressing the outer periphery thereof to reduce the area of contact and resistance to penetration of the needle through an object and to ensure a straight path of penetration. The rear end (2d) of the blade is formed with a cutter (12) for severing the tags. <IMAGE>
