The purpose of this study is to examine the effects of figural unity of non-annular test figure (TF) on simultaneous hue and brightness contrasts in Koffka-ring type patterns. To manipulate the TF's unity systematically, we investigated two stimulus conditions (five degrees of separation and two styles of division) of the TF. Eight subjects measured, through matching, the apparent hue and brightness of the TF overlapping red-green or black-white inducing figures. The results revealed that the magnitudes of hue and brightness contrasts (MHCs and MBCs) in divided and undivided TFs decreased as the degree of separation decreased. However, both MHCs and MBCs in the undivided TFs decreased more steeply than those in the divided TFs. In conclusion, the MHCs and the MBCs were significantly influenced by the separation and the division of the TF in almost the same manner, and the effects of dividing line on perceiving the figural unity were discussed.