Mehmet Zafer Çağlayan (born 10 November 1957 in Muş) is a Turkish[1] politician and former Minister.

Born to a Turkish-Kurdish family,[3] Çağlayan graduated with a degree in mechanical engineering from Gazi University in Ankara in 1980 and went on to a career in the aluminum industry.

On Wednesday, 21 January 2015, the Turkish parliament voted not to send to trial four former ministers accused of wrongdoing in a corruption investigation.

On 8 March 2014, during a public rally for his Justice and Development Party, Çağlayan spoke to the crowds.

On the topic of the corruption scandal, he accused the instigators of the investigation of seeking to undermine the government and said:[7] ...I would understand if a Jew, an atheist, a Zoroastrian would do all these things to us.