Starting from ideas and results given by Özkaldi, İlarslan and Yaylı in (2009), in this paper we investigate Bertrand curves in three dimensional dual space D 3. We obtain the necessary characterizations of these curves in dual space D 3. As a result, we find that the distance between two Bertrand curves and the dual angle between their tangent vectors are constant. Also, well known characteristic property of Bertrand curve in Euclid space E 3 which is the linear relation between its curvature and torsion is satisfied in dual space as We show that involute curves, which are the curves whose tangent vectors are perpendicular, of a curve constitute Bertrand pair curves.

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