Measurements of the P rho T properties for trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) in the gaseous phase were carried out using metal bellows volumometer. A total of 204 P rho T property values was obtained in the range of temperatures from (310 to 360) K, pressures from (657 to 2300) kPa, and densities from (34 to 146) kg.m(-3). The sample purity was better than 99.96 % To in mole fraction. The present data were compared with the existing data and equations of state. The Benedict-Webb-Rubin-Starling (BWRS) and Martin-Hou equations of state were used to correlate the present data.