We have recorded the photoelectron spectrum of TeOusing a hot-cathode discharge ion source and a negative ion photoelectron spectrometer.The adiabatic electron affinity of TeO is determined to be 1.697+0.022 eV. The negative ion parameters determined in this work are: wc(TeO-) = 690+ 80 cm-', rh'(TeO-) = 1.884+0.028 A, and D,(TeO-) = 3.63 f 0.15 eV.