Background: Diabetes mellitus is a major public health concern that has a significant socioeconomic impact. Diabetic peripheral neuropathy is a common complication in diabetic subjects. Electrophysiological study is commonly used for the assessment of diabetic poly neuropathy. Aim and Objectives: This study was designed to assess the motor component of median nerve conduction in type II diabetic individuals of more than 5 years duration of illness under regular treatment and also to find out the correlation between the nerve conduction study parameters and the duration of illness. Subjects and Methods: It is a cross sectional study. The left median nerve conduction study was carried out in 30 type II diabetic subjects in the age range of 40-60 years. The study group includes the diabetics of more than 5 years duration of illness who are regularly attending diabetic outpatient department. The control group includes 30 of age and gender matched healthy volunteers. Nerve conduction parameters like Motor distal latency, Amplitude and Conduction Velocity were measured. Results: It was observed that the motor distal latency of left median nerve was higher in diabetics than in healthy controls with a statistically significant difference. There was a statistically significant decrease in amplitude and conduction velocity of left median nerve in diabetic subjects than in controls also observed. All the nerve conduction study parameters were found to be correlated with the duration of the illness in diabetics. Conclusion: The present study insists upon the regular monitoring of nerve function in diabetics to prevent the crippling complications.