The reduction of nickel in presence of methylene bis thio acetic acid (referred to herein as MBTAA) has been studied polarographically in the pH range 1-7. The discharge of nickel at the d.m.e. has been found to be irreversible and diffusion controlled at constant ionic strength (1M KN03). Hence kinetics of the electrode reaction has been investigated and the values of k i net i cs parameters ( trans fer co-effi ci ent and formal rate constant kOf h) have been calculated at 25°, 30°, 35°, 40°, 45° and 50°C by Koutecky's theoretical treatment as extended by Meites and Israel. The values of thermodynamlc parameters - f" H,f" G and f"S for the system have also been evaluated at 30°C.