A mixing device produces a multi-component mixture, in particular for medical applications, and has at least one first component and one second component, whereby the first component is a pasty fluid mass, whereby the mixing device has a housing having at least one first opening and a hollow body, whereby the hollow body has an internal space that contains the second component, and the mixing device has a feed plunger for expelling the second component from the internal space of the hollow body, whereby the hollow body has a thread and the feed plunger has a counter-thread that engages the thread of the hollow body, and the mixing device has a propulsion element that is arranged inside the housing, whereby the propulsion element converts a flow of the first component through the housing into a rotary motion, whereby the rotary motion of the propulsion element screws the feed plunger into the internal space of the hollow body, and whereby the second component can thus be extruded from the hollow space into the fluid flow of the first component.