The structural performance of the Taiwanese traditional timber frame is studied in order to clarify the effects of the column, beam and Dou region in the global frame. Cyclic horizontal loading test with constant vertical force was applied to the China Fir specimens. Results shown that the moment-resisting effect of the 'full-penetrating beam' tests is generally twice that of the 'half-penetrating beam' case. The material properties of structural members such as Dou and beam have critical impact on the overall performance of the timber frame. The Cha-Jiao member, a commonly neglected member, was found to have significant moment resistance in the 'pull-in' tests of the 'halfpenetrating beam' case. This study suggests that the Cha-Jiao member should be taken into consideration during structural evaluation in future.