Burner for an exhaust gas tract through which exhaust gas from an internal combustion engine of a motor vehicle can flow, comprising: - a combustion chamber in which a mixture comprising air and a liquid fuel is to be ignited and thereby combusted, - an inner swirl chamber through which a first portion of the air can flow and which effects a swirl-like flow of the first portion of the air, which inner swirl chamber has a first outflow opening through which the first portion of the air flowing through the inner swirl chamber can flow, and via which the first portion of the air can be discharged from the inner swirl chamber, - an introduction element through which the liquid fuel can flow, and by means of which the fuel can be introduced into the inner swirl chamber, the first outflow opening of which can also be flowed through by the fuel discharged from the introduction element, and - an outer swirl chamber which surrounds at least a longitudinal region of the inner swirl chamber in a circumferential direction of the inner swirl chamber, through which outer swirl chamber a second portion of the air can flow, and which effects a swirl-like flow of the second portion of the air, and which outer swirl chamber has a second outflow opening through which the second portion of the air flowing through the outer swirl chamber, the fuel flowing through the first outflow opening, and the first portion of the air flowing through the inner swirl chamber and the first outflow opening can flow, via which second outflow opening the portions of the air and the fuel can be introduced into the combustion chamber, and - a supply channel through which the air can flow and which opens into an air chamber common to the swirl chambers (62, 76), through which the swirl chambers (62, 76), through which the portions of the air can flow along a relevant flow direction, are each at least partially overlapped in a direction opposite to the relevant flow direction, wherein the air chamber extends without interruption along a first direction extending in parallel with the relevant flow direction, and along a second direction extending perpendicularly to the relevant flow direction, characterized in that - the combustion chamber has a plurality of through-flow openings which are spaced apart from one another, and are separated from one another by wall regions designed as respective solid bodies, in particular in a radial direction of the relevant swirl chamber or, wherein burner exhaust gas can be discharged from the combustion chamber via the through-flow openings and can be introduced into the exhaust gas tract. - a combustion chamber in which a mixture comprising air and a liquid fuel is to be ignited and thereby combusted, - an inner swirl chamber through which a first portion of the air can flow and which effects a swirl-like flow of the first portion of the air, which inner swirl chamber has a first outflow opening through which the first portion of the air flowing through the inner swirl chamber can flow, and via which the first portion of the air can be discharged from the inner swirl chamber, - an introduction element through which the liquid fuel can flow, and by means of which the fuel can be introduced into the inner swirl chamber, the first outflow opening of which can also be flowed through by the fuel discharged from the introduction element, and - an introduction element through which the liquid fuel can flow, and by means of which the fuel can be introduced into the inner swirl chamber, the first outflow opening of which can also be flowed through by the fuel discharged from the introduction element, and - an outer swirl chamber which surrounds at least a longitudinal region of the inner swirl chamber in a circumferential direction of the inner swirl chamber, through which outer swirl chamber a second portion of the air can flow, and which effects a swirl-like flow of the second portion of the air, and which outer swirl chamber has a second outflow opening through which the second portion of the air flowing through the outer swirl chamber, the fuel flowing through the first outflow opening, and the first portion of the air flowing through the inner swirl chamber and the first outflow opening can flow, via which second outflow opening the portions of the air and the fuel can be introduced into the combustion chamber, and - a supply channel through which the air can flow and which opens into an air chamber common to the swirl chambers (62, 76), through which the swirl chambers (62, 76), through which the portions of the air can flow along a relevant flow direction, are each at least partially overlapped in a direction opposite to the relevant flow direction, wherein the air chamber extends without interruption along a first direction extending in parallel with the relevant flow direction, and along a second direction extending perpendicularly to the relevant flow direction, characterized in that - the combustion chamber has a plurality of through-flow openings which are spaced apart from one another, and are separated from one another by wall regions designed as respective solid bodies, in particular in a radial direction of the relevant swirl chamber or, wherein burner exhaust gas can be discharged from the combustion chamber via the through-flow openings and can be introduced into the exhaust gas tract.