The spectrum of the Venus dayglow between 1280 and 1380 A has been measured in high-resolution with the International Ultraviolet Explorer. Seven exposures which were made with the short wavelength camera in the high-dispersion mode using the large aperture were combined to give a total exposure time of 309 min. The atomic oxygen lines at 1302.2, 1304.9, 1306.0, and 1355.6 A are present. In addition, the (14, 3) and (14,4) bands of the carbon monoxide fourth positive system at 1317 and 1354 A respectively are identified. These bands are compared with synthetic spectra, showing the excitation mechanism to be fluorescent scattering of solar Lyman alpha radiation.