The invention relates to a device (1) for storing, mixing, and applying polymethylmethacrylate bone cement, comprising a first container (2) for a first pasty component of the bone cement, a dispensing plunger (18) that is arranged such that it can be shifted in the first container (2) and serves for extruding the content of the first container (2) through a dispensing tube (10) opposite from the dispensing plunger (18), whereby the dispensing tube (10) is arranged such that it can be rotated and shifted in longitudinal direction through a feed-through in a side of the first container (2) opposite from the dispensing plunger (18), and a mixing facility (36) for mixing the content of the first container (2), whereby the mixing facility (36) is arranged in the first container (2) and is secured to the dispensing tube (10) such that the mixing facility (36) can be moved in the first container (2) by moving the dispensing tube (10) in order to mix the content of the first container (2), whereby at least one second container (4, 5) for at least one second component of the bone cement is arranged on the first container (2), whereby the internal space of the at least one second container (4, 5) is closed with respect to the internal space of the first container (2) by means of a closure (22), which can be opened, and [whereby] the at least one second container (4, 5) is limited, on the side opposite from the closure (22), by a dosing plunger (6, 24), and whereby at least one limiting surface of the first container (2) is formed by a mobile volume compensation element. The invention also relates to a method for producing a polymethylmethacrylate bone cement using a device (1) of this type and the steps of: A) providing the device (1), whereby the first container (2) is filled with a first liquid or pasty component of the PMMA bone cement and the at least one second container (4, 5) is filled with a second component of the PMMA bone cement, which preferably is powdery or pas
