A liquid reducing agent jetting nozzle structure in an exhaust emission control system for reduction-purifying Nox in exhaust gas by jetting liquid reducing agent into an exhaust gas flow passage, wherein the forward ends (12a, 20a, 30a, 40a) of liquid reducing agent jetting nozzles (12, 20, 30, 40) projecting from the wall face of the exhaust gas passage (9) into the passage are bent obliquely with respect to the direction of exhaust gas flow, or the orientation of the jet holes (21, 31, 41) at the forward ends of the nozzles is inclining to the exhaust gas flow direction side with respect tothe radial direction perpendicular to the central axes at the forward ends of the nozzles or shifted in the circumferential direction of the forward ends of the nozzles.