In the present study, the photoionization spectrum of the SO2 molecule in a molecular beam was studied in detail using radiation of the ArF (λ=193nm) and XeCl (λ=308nm) excimer lasers. No signals corresponding to the Van der Waals complexes or clusters of the SO2 could be detected. The profile of the SO+ and S+ peaks at 193nm could be fitted by superposition of two Gaussian functions, while at 308nm a single Gaussian was sufficient. Power dependencies studied show that photoionization is a multiphotonic process in both cases.