This paper considers Hayek's theory of spontaneous order as an answer to the question ; how is an individualistic social order possible? Hayek tried to show how both individual freedoms and social efficiencies can be consistently achieved on the process of spontaneous order and cultural evolution. But his explanation is founded on the model of a somewhat double-faced individual, that is, an individual who is in the context of spontaneous order a subject dependent on the system of rules and in the context of cultural evolution a non-subject independent of it. Accordingly his theory is not based on the model of a subject independent of the system of rules. Therefore the normative problem of individualistic order is not an answerable question in his theory.