The Senior Unofficial Member, later Senior Member and, finally, Convenor of the Non-official Members, was the highest-ranking unofficial member of the Legislative Council (LegCo) and Executive Council (ExCo) of British Hong Kong, which was tasked with representing the opinions of all unofficial members of the council to the Governor.

The Executive Council of Hong Kong (ExCo) is the cabinet of the Government of Hong Kong, acting as a formal body of advisers to the Chief Executive of Hong Kong that serves as a core policy-making organ assisting the Chief Executive. It is analogous to other Executive Councils in the Commonwealth such as the Federal Executive Council of Australia, the Executive Council of New Zealand, and the Privy Council of the United Kingdom.