The invention relates to a system for dispensing two components, which comprises a syringe or cartridge, a closing cap and a mixer. The aim of the invention is to provide a system of the aforementioned kind wherein the closing cap is detachable fastened on the syringe or cartridge and the mixer is non-detachable fastened on the cartridge. For this purpose, the fastening means are configured accordingly. The inner bead on the closing cap, in the zone of transition to the cap interior, is provided with a bevelled section that rests on the retaining cams or the retaining bead of the cartridge, while the retaining means on the mixer engage behind the retaining means on the cartridge, thereby forming a non-detachable connection. The invention provides an inexpensive and yet reliable system for dispensing two components, especially for use in dental and medical technology.