PURPOSE: A muffler for a vehicle is provided to effectively collect harmful material contained in exhaust gas of the vehicle and to effectively reduce the noise generated when exhaust gas is discharged. CONSTITUTION: A muffler for a vehicle comprises a case(2) having a hollow section(3). Front and rear end of the case(2) are formed as a semi-spherical shape. A plurality of mixing units(4) are provided in the hollow section(3) in a row. A separator(5) is provided on the hollow section(3) for separating water containing harmful material from exhaust gas. A plurality of filters(6) are installed between an outer periphery of the mixing unit(4) and an inner periphery of the case(2). The mixing unit(4) forms a connection pipe(9) in which an impeller(10), and an injection nozzle(12) having a plurality of injection holes are installed.
