Taking advantage of the largeγ-detector array Gammasphere and the recoil mass separator FMA,highspin states in 117Ba were investigated through the recoil-β-delayed proton decay tagging technique via the heavy-ion induced fusion-evaporation reaction 64Zn(58Ni,2p3n)117Ba,at a beam energy of 305 MeV.Promptγrays belonging to 117Ba have been identified furthermore,a rotational band has been identified for the first time and presented as band A in Fig.1.