Abstract The rust was recorded for the first time on Mucuna sanjappae Aitawade & S. R. Yadav. Present paper reports M. sanjappae as new host record for Uromyces mucunae Rabenh. Key words- Mucuna sanjappae, new host record, rust, Uromyces mucunae . Mucuna is one of the important genera of family Fabaceae. It is one of the important sources of the toxic compound 3, 4 – dihydroxy-L-phenylalanine (L-DOPA). In Mucuna L-DOPA content is significantly proved to be useful for treatment of nurogenerative disorder. During field visits, the authors came across infected plants of Mucuna sanjappae Aitawade & S. R. Yadav. Small, irregular black spots occurred on mature leaves covering the whole lower surface. Infected leaves were collected from diseased plants and brought to the laboratory. Thin sections through spots were made to examine the fungus. The fungus showed characters as: telia hypophyllous, scattered, minute, punctiform, pulverulent, blackish- brown; urediniospores intermixed, globose or sub- globose, densely verrucose-echinulate, subhyaline, 18– 22 µm in diam.; paraphyses clavate, curved, hyaline; teliospores globose or depressed globose, densely verrucose, chestnut-brown, 18– 22 µm in diam.; pedicels thick, hyaline, longer than spores. Based on the above characters, the disease causing fungus was identified as