The vapor pressure data of 2,3,3,3-tetrafluoroprop-1-ene (CF(3)CF=CH(2), HFO-1234yf) were measured using a constant-volume apparatus. Measurements were carried out in a wide temperature range, from (224 to 366) K, and at pressures from (39 to 3218) kPa. A total of 35 experimental points were obtained. The measurements were Fitted to the Wagner equation with an absolute deviation of 0.35 %. To our knowledge, no other experimental results have been published in the open literature on the properties Studied here; for this reason, our experimental results were compared with a preliminary equation of state.