Lui Lok (simplified Chinese: ??; traditional Chinese: ??; 16 May 1920 – 13 May 2010), also named Lui Mo Lok (???; ???), dubbed as 'The Five-Hundred-Million-Dollar Inspector', was a former Hong Kong Detective Staff Sergeant I.
He became notorious for his acts of corruption during the 1960s to 1970s during British Hong Kong period, and being wanted by ICAC.