Genetic studies are becoming commercialized more and more which may do harms to objectivity of science and human subjects too. It is necessary to exert a duty to disclose financial interests in research on researchers. This obligation is justified by some values and policies such as individual autonomy, better trust. The fiduciary relationship between researchers and human subjects is the base of the duty. In comparative law this kind of legal obligation does exist. The obligation should be designed better. All kinds of researchers should be responsible for this compulsive duty. It is necessary to clarify when to disclose. What to disclose should be defined properly. Process of disclosure should be set up.