The invention relates to a securing device (1) for a control rod (14) in a nuclear plant (16), comprising a control rod drive (5) and a drive housing (4), which encloses the control rod drive (5) and which is designed to be fed through a reactor pressure wall (3). The aim of the securing device (1) is to prevent, in the most reliable manner possible, the control rod (14) from being extended in an uncontrolled manner. Furthermore, the securing device (1) should be as inexpensive as possible and should pose the slightest obstacle possible to installation work. For this purpose, the drive housing (4) has, according to the invention, at least one coupling element (9) for forming a force-locked and/or form-fit connection of the drive housing (4) to the reactor pressure wall (3).