Usually, headed studs are vertically welded in a steel surface. However, we think that composite beam using inclined headed studs improves shear stiffness and strength. In this paper, we investigated the mechanical property of connection using inclined headed studs through the test under cyclic shear load. It was found from the test results that positively inclined headed studs have higher shear stiffness and strength. And, we proposed appropriate arrangement and the direction of inclined headed stud for each of the beam and the girder. Moreover, we proposed the evaluation method of ultimate shear strength of connection using inclined headed studs.
