Diabetes is known as one of the life threatening diseases in the world that occurs not only among adults and elderly, but also among infants and children. Blood glucose measurements are essential for diabetes patients to determine their insulin dose intake and continuous monitoring is vital to ensure that glucose level is always within the normal range. The commonly used methods to measure glucose level in blood are invasive or minimally invasive which are high in accuracy but are usually painful and has higher risk of infections. As an alternative, non-invasive technique are introduced to develop a pain free measuring method. In this project, a portable non-invasive blood glucose monitoring device is developed using near infrared sensors. Besides being able to detect glucose concentration in blood, the device is also able to display the glucose level and the required insulin dose, corresponding to the body mass index (BMI) of the user. Several in vitro and in vivo experiments were conducted to test the reliability of the device. Results of the experiments proved that the device is reliable in glucose detection with 1%-10% accuracy compared to the common invasive finger-prick method.