There is a trial to increase as four years of the premedical course to make doctors with better humanities and variable educational backgrounds and good researchers in basic medicines. We studied the trial in the present situation of the Korea in several viewpoints. There will be a confusion between doctors in an organization and there are many problems expected with two different educational system in a country. Moreover, two years of premedical course and four years of medical course are enough to be a clinician, especially a primary care doctor, and there will be an increased costs and late age to be a doctor if premedical course are increased as four years. It is not a real reason for the lack of applicants to be good researchers in basic medicines that short promedical course and lack of non-medical educational backgrounds. Also situation of medical schools in the Korea is not suffice to extend their facillities and faculties. Finally advantages from the extension of the premedical course can be gained with introductions of the limited bachelor’s admission and or dual major system. The most important things is the single educational system to be a doctor and leaving the system to the discretion of the medical schools or universities.