This article deals with international norms influencing foreign policy of a state. It looks at the extent to which the OSCE human rights norms influence foreign policy. It also presents the results of a questionnaire survey carried out in Turkey. As far as the types of norms are concerned, the OSCE human rights norms have been divided into substantive and non-substantive norms. The following conceptual hypothesis has been constructed: nonsubstantive human rights provisions of the OSCE documents have more influence than substantive ones on foreign policy with a human rights objective. The research has shown that the OSCE human rights norms guide the decision-making process of foreign policy with a human rights objective. It has also shown that non-substantive human rights provisions of the OSCE documents guide the decision-making process of foreign policy with a human rights objective more than substantive human rights provisions. It is, hovvever, important to note the fact that Turkey has human rights problems, and is in the way of becoming Europeanised, has affected the extent of guidance of the OSCE human rights norms in foreign policy