We report the effect of oxygen on the action spectrum of the steady-state photoconductivity (PC) of C-60 film and its temperature dependence. The steady-state PC decreases more than 4 orders of magnitude upon exposure to oxygen; the PC decreases faster below HBAR omega approximate to 2.3 eV. The low-temperature PC spectrum of the oxygen-free C-60 is similar to the high-temperature PC spectrum of C-60 exposed to oxygen. The steady-state PC exhibits a peak at T approximate to 240 K in the oxygen-free C-60, which disappears in C-60 exposed to oxygen. The results indicate that the oxygen in C-60 film acts as an efficient deep trap for photoexcited carriers and reduces the structural order.