The paper aims to throw light in what manner the theory of attachment can be applied in practice. The following applied studies act as intermediaries connecting theory and practice: (a) studies concerning the place and the role of attachment in partnership, parental and family functioning; (b) those concerning attachment and dysfunctional forms of behavior and (c) those concerning counseling and therapeutic applications of the attachment theory. In the paper these are illustrated by concrete research subjects and approaches. Main findings have been put in relation with the field of practical application. In the final part of the work, the author deals with the nature, the dynamics and the phases of relation between knowledge gained through theoretical research and its application in practical work. The author draws the conclusion that the relation between theory and practice, in the field of the attachment theory, is in the phase of early development characterized by asymmetric developmental levels and unidirectional influence. Highly developed theory enriches the practice by providing the basis for understanding the development and close relations; practice validates theory and its usability. However, the level of mutual influence where the practice of direct work with individuals would shape the theory has not been reached.