Exhaust system, especially for an internal combustion engine of a vehicle, comprising a mixer assembly unit with a mixer body with an inflow side and with an outflow side and with a plate-like carrier element with a carrier element body arranged radially outwards in relation to the mixer body relative to a mixer longitudinal axis adapted ring-like, wherein the mixer body comprises a plurality of flow deflection elements and at least one holding area, wherein the carrier element comprises, in association with at least one holding area, a counter-holding area, wherein at least one counter-holding area is connected in substance to a holding area, wherein the mixer assembly unit is arranged in a junction area in which two tubular exhaust gas guide elements (14a, 16a) adjoin one another, wherein each of the exhaust gas guide elements (14a, 16a) comprises in the junction area a flange-like coupling section (20a, 22a) for coupling with the coupling section (20a, 22a) of the respective other exhaust gas guide element (14a, 16a), wherein the carrier element body of the mixer assembly unit is arranged between the flange-like coupling sections (20a, 22a) of the exhaust gas guide elements (14a, 16a), characterized in that - at least one counter-holding area extends over a holding area on a side oriented in the direction of the outflow side of the mixer body at least partially radially and axially radially inwards, - that the at least one counter-holding area comprises an essentially U-shaped holding section with two U-legs (52a, 54a) and a connection area connecting these, wherein the U-legs (52a, 54a) and the connection area border a holding area receiving space, which is open essentially in the direction of the inflow side of the mixer body, - that one of the U-legs (52a, 54a) is arranged radially outwards in relation to the holding area arranged in the holding area receiving space, that one of the U-legs (52a, 54a) is arranged radially inwards in relation to the holding area arranged in the holding area receiving space, and that the holding area is connected to the U-leg arranged radially inwards in relation to this holding area, and - that a coupling element is provided, which encloses the flange-like coupling sections (20a, 22a) in at least some areas radially outwards and extends over them on their axial sides oriented facing away from one another radially inwards. - at least one counter-holding area extends over a holding area on a side oriented in the direction of the outflow side of the mixer body at least partially radially and axially radially inwards, - that the at least one counter-holding area comprises an essentially U-shaped holding section with two U-legs (52a, 54a) and a connection area connecting these, wherein the U-legs (52a, 54a) and the connection area border a holding area receiving space, which is open essentially in the direction of the inflow side of the mixer body, - that one of the U-legs (52a, 54a) is arranged radially outwards in relation to the holding area arranged in the holding area receiving space, that one of the U-legs (52a, 54a) is arranged radially inwards in relation to the holding area arranged in the holding area receiving space, and that the holding area is connected to the U-leg arranged radially inwards in relation to this holding area, and - that a coupling element is provided, which encloses the flange-like coupling sections (20a, 22a) in at least some areas radially outwards and extends over them on their axial sides oriented facing away from one another radially inwards.