Abstract: An applicator and applicator kit for particulate bone replacement materials, autologous or heterologous cancellous bone, demineralised bone matrix. The applicator (1) contains a hollow tube (12) including on one end a bladed shutter. The applicator comprises first fastener (15) for engaging a second component. The second component contains a rod (2) with a handle (21) on one end and a plunger (22) on the opposite end. The rod is arranged in a guide sleeve which is moved along the rod (2) and comprises second fastening means (23) that can be connected to the fastener (15) of the applicator (1) in reversible manner. The applicator kit contains a mixing cup connected to the tube (12) instead of the rod such that the material to be applied is filled into the tube (12) easily prior to application.