Exhaust purification device

An exhaust emission control device with an exhaust system including an aftertreatment device for purifying exhaust gas passing therethrough and with an adopted layout for turnabout introduction of the exhaust gas into said aftertreatment device, characterized in that it comprises a gas dispersion portion for covering an entry end face of said aftertreatment device and for introducing the exhaust gas thereinto through an exhaust feed port from a direction substantially perpendicular to an axis of said aftertreatment device and an exhaust conduit curved from the exhaust feed port in said gas dispersion portion toward an exit side of said aftertreatment device to extend axially of said aftertreatment device, said gas dispersion portion being of a crushingly deformed shape to ensure an area from said exhaust feed port in said gas dispersion portion to a vicinity of an extension of the axis of said aftertreatment device as a fan-likely spreading flow guide space, a remaining area being a flat throttling space close to the entry end face of said aftertreatment device, a boundary between said throttling and flow guide spaces in the crushingly deformed shape being formed as an arc-like taper slope.