Zia Mohiuddin Dagar (AKA Z. M. Dagar) (1929 – 1990), from Udaipur, Rajasthan, was a North Indian (Hindustani) classical musician. One of the 19th generation of Dagar family dhrupad musicians, he was brother and musical teacher to Zia Fariduddin Dagar. Z. M. Dagar was largely responsible for the revival of the rudra vina as a solo concert instrument. He modified the instrument to better equip it for solo performance, transforming it into a larger bass instrument (sometimes called a 'Dagar veena'): he enlarged the tumbas (gourds) and dhandhi (hollow neck) to create greater resonance and to allow the notes to sustain longer and so better reproduce the techniques used in dhrupad singing.