As social demand on the improved performance of concrete is consistently increased, the researches on fiber reinforced concrete have also been actively conducted till this moment. Especially, steel fibers are easy to produce, have homogeneous material properties, and can be easily mixed with concrete, on which many studies were forced. The steel fiber reinforced concrete(SFRC) has improved performance in tensile strength, crack control ability, and ductile failure modes, which leads to have the greater shear strength of flexural members. Most analysis or experimental studies on shear of SFRC beams, however, have been focussed on shear strength prediction, and few investigations on shear transfer mechanism of SFRC at crack surface is available. Thus, in this study, 15 SFRC direct shear specimens were fabricated and tested with primary parameters of compressive strength and steel fiber volume fraction. Based on the test results, the constitutive equations for shear behaviour of SFRC at crack surfaces were proposed, which showed good agreements to test results.