Abstract: A dispenser for applying a viscous material, in particular hot melt adhesive, to a substrate, includes: a base body, and a plurality of dispensing modules arranged side by side in series along a lateral axis of the dispenser and attached to the base body. The dispensing modules each have at least one recess which, together with a recess of an adjacent dispensing module, forms a fastening aperture. In each of the fastening apertures a bolt is seated, the bolt is fastened to the base body and is supported on a side of the dispensing modules facing away from the base body against both dispensing modules forming the respective fastening aperture.