Hui Yin-fat, OBE, JP (Chinese: 許賢發; 28 April 1936 – 7 December 2016) was a Hong Kong social worker and politician.

In 1991, he was briefly appointed by Governor David Wilson to the Executive Council of Hong Kong after the 1991 general election.

He was considered part of the liberal bloc in the legislature and voted for the controversial constitutional reform package put forward by the last colonial governor Chris Patten.

He stepped down in 1995 and his seat was succeeded by Law Chi-kwong, member of the Democratic Party.

Despite his political stance, he remained friendly relationship with the Beijing authorities and was appointed Hong Kong Affairs Advisor.