【正】 The mass of <sup>168</sup>Dy is measured for the first time,using the two-proton pick-up reaction <sup>170</sup>Er(<sup>18</sup>O,<sup>20</sup>Ne)at an <sup>18</sup>O energy of 104 MeV.The products of the reaction are detected at the focal plane ofthe Q3D spectrometer.The mass excess of <sup>168</sup>Dy is found to be -58.56±0.14 MeV.