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The purpose of this study is to determine the value of shear forces for coupling beam using annealed wire fiber. It also discusses the relationship of force-strain in annealed wire fiber of RC coupling beam. The design and construction of the coupling beams remain challenging due to the presence of large reversed-cyclic nonlinear rotation demands combined with large shear forces. Annealed wire fiber used in research with diameter (D) 0.8 mm with fiber length (L) 48 mm (L/D ratio is 60) with fiber composition 0.75% of volume. Two coupling beam test specimens measuring 20 cm x 40 cm with a length of 115 cm with a ratio of Ln / h is 2.875 with the details of 1 beam coupling without fiber (CB-1) and 1 beam coupling with fiber (CBF-1). It can be seen in the variation of normal concrete CB-1 results of an experimental analysis of 113.32 kN and in the fiber concrete CBF-1 can be seen that the experimental shear strength of 163.37 kN then it can be seen the shear strength of the CBF-1 experimental analysis is 44.16% greater than the shear strength experimental CB-1.