The wave-damping performance of a single perforated and inclined plate was explored through physical model tests under two-dimensional regular waves. In the tests, the plate is installed with angles of 15° and -15°, and porosity ratios of 0%, 10%, 20%, and 30%, respectively. The variation of the reflection, transmission, and energy dissipation coefficients with the relative width(the ratio of plate width to wave length)are also presented. The results demonstrate that an inclined plate with an angle of 15° can dissipate more energy than that with an angle of -15°. The relative width and the porosity ratio both influence the wave-damping performance.