An exhaust purification device for a diesel engine, the device comprising: an oxidation catalyst that is disposed in an exhaust passage of the diesel engine and purifies CO and HC in exhaust gas; a urea injection nozzle that is disposed in the exhaust passage downstream of the oxidation catalyst and generates ammonia through atomization of urea water into the exhaust gas; a turbine of a turbocharger, this turbine being disposed in the exhaust passage downstream of the urea injection nozzle and accelerating decomposition of urea through agitation of the atomized urea water; and a selective reduction catalyst that is disposed in the exhaust passage and detoxifies NOx in the exhaust gas through a reduction reaction with ammonia, characterized by a diesel particulate filter that is disposed in the exhaust passage downstream of the turbine and that traps particulate matter in the exhaust gas, wherein the selective reduction catalyst is disposed in the exhaust passage downstream of the diesel particulate filter, the oxidation catalyst has a manifold oxidation catalyst disposed at each cylinder portion of an exhaust manifold of the diesel engine and a pre-turbine oxidation catalyst disposed at a junction portion of the exhaust manifold, the manifold oxidation catalyst being superior to the pre-turbine oxidation catalyst in CO purification. the device comprising: an oxidation catalyst that is disposed in an exhaust passage of the diesel engine and purifies CO and HC in exhaust gas; a urea injection nozzle that is disposed in the exhaust passage downstream of the oxidation catalyst and generates ammonia through atomization of urea water into the exhaust gas; a turbine of a turbocharger, this turbine being disposed in the exhaust passage downstream of the urea injection nozzle and accelerating decomposition of urea through agitation of the atomized urea water; and a selective reduction catalyst that is disposed in the exhaust passage and detoxifies NOx in the exhaust gas through a reduction reaction with ammonia, an oxidation catalyst that is disposed in an exhaust passage of the diesel engine and purifies CO and HC in exhaust gas; a urea injection nozzle that is disposed in the exhaust passage downstream of the oxidation catalyst and generates ammonia through atomization of urea water into the exhaust gas; a turbine of a turbocharger, this turbine being disposed in the exhaust passage downstream of the urea injection nozzle and accelerating decomposition of urea through agitation of the atomized urea water; and a selective reduction catalyst that is disposed in the exhaust passage and detoxifies NOx in the exhaust gas through a reduction reaction with ammonia, characterized by a diesel particulate filter that is disposed in the exhaust passage downstream of the turbine and that traps particulate matter in the exhaust gas, wherein the selective reduction catalyst is disposed in the exhaust passage downstream of the diesel particulate filter, the oxidation catalyst has a manifold oxidation catalyst disposed at each cylinder portion of an exhaust manifold of the diesel engine and a pre-turbine oxidation catalyst disposed at a junction portion of the exhaust manifold, the manifold oxidation catalyst being superior to the pre-turbine oxidation catalyst in CO purification.