The influence of different doping ions on the emission and scintillation characteristics of PbWO4 scintillator was studied. In the case of Ce doping, efficient non-radiative recombination at Ce sites takes place, resulting in lower light yield and faster luminescence and scintillation response. Low temperature thermoluminescence characteristics resemble those obtained earlier for La3+ (Y3+,Lu3+,Gd3+) doping ions. Tb3+, Sm3+ and Pr3+ doping results in an additional emission-the leading emission lines are obtained at 543, 641 and 602 nm, respectively. Corresponding decay times were measured to be 650, 848 and 61 mus at 295 K, respectively.