Instead of the wooden tenon, steel tenon-bar connecter which is inserted into the joint of the horizontal member and column and fixed with drift pins have been suggested. The combined stress from the shear and tensile force in the joint has been considered to be transferred through the steel tenon-bar connecter and thus the resistant force of the point is necessary to be verified. The present evaluation formula serves as an underestimate compared with experimental result. To overcome such underestimation, in this paper the evaluation formula for combined stress in the joint of horizontal member and column connected by steel tenon-bar connecter which is attached to the compressive brace has been derived based on the mechanics model, and the validity of the formula has been verified by experiment.