A　pounding　tuned　mass　damper　(PTMD)　can　be　considered　as　a　passive　device,　which　combines　the　merits　of　a　traditional　tuned　mass　damper　(TMD)　and　a　collision　damper.　A　recent　analytical　study　by　the　authors　demonstrated　that　the　PTMD　base　on　the　energy　dissipation　during　impact　is　able　to　achieve　better　control　effectiveness　over　the　traditional　TMD.　In　this　paper,　a　PTMD　prototype　is　manufactured　and　applied　for　seismic　response　reduction　to　examine　its　efficacy.　A　series　of　shaking　table　tests　is　conducted　in　a　three-story　building　frame　model　under　single-dimensional　and　two-dimensional　broadband　earthquake　excitations　with　different　excitation　intensities.　The　ability　of　the　PTMD　to　reduce　the　structural　responses　is　experimentally　investigated.　The　results　show　that　the　traditional　TMD　is　sensitive　to　input　excitations,　while　the　PTMD　mostly　has　improved　control　performance　over　the　TMD　to　remarkably　reduce　both　the　peak　and　root-mean-square　(RMS)　structural　responses　under　single-dimensional　earthquake　excitation.　Unlike　the　TMD,　the　PTMD　is　found　to　have　the　merit　of　maintaining　a　stable　performance　when　subjected　to　different　earthquake　loadings.　In　addition,　it　is　also　indicated　that　the　performance　of　the　PTMD　can　be　enhanced　by　adjusting　the　initial　gap　value,　and　the　control　effectiveness　improves　with　the　increasing　excitation　intensity.　Under　two-dimensional　earthquake　inputs,　the　PTMD　controls　remain　outperform　the　TMD　controls;　however,　the　oscillation　of　the　added　mass　is　observed　during　the　test,　which　may　induce　torsional　vibration　modes　of　the　structure,　and　hence,　result　in　poor　control　performance　especially　after　a　strong　earthquake　period.