We demonstrated orientation control of n-type rod-shape, 2,2-Bis[4-(trifluoromethyl)phenyl]-5,5-bithiazole (BTMPB) molecules when deposited on the in-plane oriented polythiophene (PT) and -sexithiophene (6T)/PT films in vacuum. The results showed that the - stacking direction of BTMPB molecules on the PT and 6T/PT films is perpendicular to the substrate plane. In addition, a molecular long axis of BTMPB oriented parallel to the friction direction of the PT. Moreover, in-plane orientation of BTMPB was more enhanced by in-plane oriented 6T molecules than in-plane oriented PT underneath. On the other hand, the molecular long axis of BTMPB deposited on the substrates stood on the substrates.