Oscillator strengths for 140 lines of Th II were calculated from the data in the NBS Tables of Spectral-Line Intensities.The relative level populations were determined from measurements of lines of Fe I in the same light source.The absolute scale is determined by means of the lifetime of the level at 24874 cm-1 recently measured by T. Andersen and A. P. Petkov (1975).The uncertainty in the present results is ≈35%.