A fixing device for securing into a hole in plasterboard 23, comprising: a body 1 having an anchor receiving aperture 3, and a passage 37a that extends within the body, spaced from the anchor receiving aperture 3; a shaft 5a provided within the passage 37a, the shaft 5a being rotatably movable within the passage 37a, independent of axial movement within the passage 37a; and a retaining member 19a coupled to the shaft 5a and configured to be movable between an extended position, in which the device is retainable in said hole, and a retracted position, in which the fixing device is removably insertable into said hole.