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To study the capacity of a lateral load resistance of a joint with Jangbu-connection of Dori-directional frame in traditional wood structure system, 1/2 scaled and T-shaped 7 subassemblies of joint of Dori-directional frame of Deawoongjeon of Bongjungsa were tested. Cyclic Lateral force was applied to column for story drift to be reached 4%. From the experiment, it was shown that the capacity of a lateral load resistance was influenced by the vertical load confining joint and not influenced by the number of Chok and the depth of Changbang. And lateral load resistance mechanism is developed by the restraint between the vertical load and the contacting edge of column; if structure is pushed to the left, the top-right end of Pyeongju contacts with Changbang and left Changbang loses the contacts with Pyeongju and therefore only right Changbang can resist to lateral load.