Diabetes is the chronic disorder in the metabolism of protein, fats and carbohydrates. IT is described as an increase in the blood glucose after any type of meal. Diabetes results from either insulin deficiency or malfunction. The 25%of the world population is affected by the diabetes. Aim of the present study is evaluated various medicinal plants used for antidiabetic activity. medicinal plants are used in traditional medicine to treat diabetes. The greatest advantage of medicinal plants is that these are readily available and have very low side effects. Most of the plants contains carotenoids, flavonoids, terpenoid, alkaloid, glycosides and can of fen have antidiabetic effect. Traditional medicine (herbal)is used for the treatment of diabetes in developing countries where the cost of conventional medicine is a burden to the population. many indigenous Indian medicinal plants have been found to successfully manage diabetes.