Background: Mastoid cavity resulting from a canal-wall-down (CWD) mastoidectomy causes major morbidity in the form of chronic discharge and infection in addition to difficulty in the fitting of hearing aids and giddiness. To overcome these problems, mastoid obliteration is recommended in many cases of canal wall down Mastoidectomy where the size of the cavity may turn out to be large. Methods: This study demonstrates the authors’ technique of the Rambo flap for mastoid cavity obliteration performed in over 120 cases of CWD mastoidectomies. Conclusion: The Rambo flap is an effective method of mastoid cavity obliteration that limits the size of the final mastoid bowl in CWD mastoid surgeries minimizing revision rates.