Ustad Zia Mohiuddin Dagar (14 March 1929 – 28 September 1990), popularly known as Z. M. Dagar, was a Hindustani classical musician, one of the 19th generation of Dagar family dhrupad musicians. He was largely responsible for the revival of the rudra vina as a solo concert instrument. Zia Mohiuddin Dagar was born in Udaipur, Rajasthan, India, and began musical study with his father, Ustad Ziauddin Khan Dagar, court musician for the Maharana of Udaipur.