The invention relates to a device for mixing a bone cement (55), the device comprising at least one cartridge (1), wherein the cartridge (1) comprises in its interior a cylindrical mixing chamber (2), a discharge piston (4) which can be moved in the cylindrical mixing chamber (2) in the longitudinal direction and which is sealed against the walls of the mixing chamber (2), a mixing device (7) for thoroughly mixing the content of the mixing chamber (2), which is arranged in the interior of the mixing chamber (2), wherein the mixing device (7) can be operated externally via a mixing rod (6) and wherein the mixing rod (6) is guided through a passage in the discharge piston (4) in such a manner that it can be rotated and displaced in the longitudinal direction by the discharge piston (4), wherein the cartridge (1) comprises a discharge opening (5) opposite the discharge piston (4), wherein in the mixing chamber (2) a first component (3) of the bone cement (55) is contained between the discharge piston (4) and the discharge opening (5), wherein a monomer fluid as a second component of the bone cement (55) is introducable through the discharge opening (5) into the mixing chamber (2), and wherein the device comprises a locking element (9, 10) with which the mixing rod (6) is affixable or is affixed to the discharge piston (4) in such a manner that the discharge piston (4) can be moved by means of the mixing rod (6) in the mixing chamber (2) in the longitudinal direction. The invention also relates to a method for storing and mixing a bone cement (55) with such a device.本發明係關於一種用於混合一骨水泥(55)之裝置，該裝置包含：至少一個筒(1)，其中該筒(1)在其內部包含一圓柱形混合腔室(2)；一排出活塞(4)，其可在該圓柱形混合腔室(2)中在縱向方向上移動且抵靠該混合腔室(2)之壁而密封；一混合裝置(7)，其用於完全混合該混合腔室(2)之內含物，該混合裝置配置於該混合腔室(2)之內部，其中該混合裝置(7)可經由一混合棒(6)在外部操作，且其中該混合棒(6)以使得其可藉由該排出活塞(4)在該縱向方向上旋轉及位移之一方式導引穿過該排出活塞(4)中之一通道，其中該筒(1)包含與該排出活塞(4)對置之一排出口(5)，其中在該混合腔室(2)中，該骨水泥(55)之一第一成份(3)含於該排出活塞(4)與該排出口(5)之間，其中一單體流體作為該骨水泥(55)之一第二成份可經由該排出口(5)引入至該混合腔室(2)中，且其中該裝置包含一鎖定元件(9、10)，藉由該鎖定元件，該混合棒(6)以使得
