Nozzle for a plasma torch head, laser cutting head or plasma laser cutting head, comprising a body with a longitudinal axis M, with a front end, with a rear end and with a nozzle opening at the front end, wherein the nozzle opening at the front end, as viewed from the front end, comprises at least the following portions in a longitudinal sectional view: - a first portion A1 which extends along the longitudinal axis M and which narrows in the direction of the rear end and which has an inner surface and a body edge at the front end, and - a second portion A3 which extends along the longitudinal axis M and which has an inner surface and a body edge at the transition from the first portion A1 to the second portion A3, wherein a virtual connecting line V1 between the body edge of the nozzle opening at the front end and the body edge at the transition from the first portion A1 to the second portion A3 includes with the longitudinal axis M an angle α1 in a range from 15° to 40°, more preferably in a range from 20° to 38°, even more preferably in a range from 20° to 35° and most preferably in a range from 25° to 35°, and/or the inner surface of the first portion A1 includes with the longitudinal axis M an angle α in a range from 10° to 30°, more preferably in a range from 12° to 30°, even more preferably in a range from 14° to 25°, even more preferably in a range from 15° to 20° and most preferably in the range from 17° to 20°, and either a virtual connecting line V3 between the body edge at the transition from the first portion A1 to the second portion A3 and the body edge at the transition from the second portion A3 to the third portion A5 includes with the longitudinal axis M an angle γ1 in a range from 0° to 8°, preferably of 5°, with widening in the direction of the rear end, or in a range from 172° to 180°, preferably of 175°, with narrowing in the direction of the rear end, or extends parallel to the longitudinal axis M, or the inner surface of the second portion A3 widens at an angle γ in a range from 0° to 8°, preferably of 5°, in the direction of the rear end or narrows at an angle in a range from 172° to 180°, preferably of 175°, in the direction of the rear end, or extends parallel to the longitudinal axis M, characterized in that, at the transition or before or immediately before the transition from the first portion A1 to the second portion A3, there is situated at least one further inner surface which extends at an angle β to the longitudinal axis M in a range from 45° to 120°, more preferably in a range from 60° to 110°, even more preferably in a range from 80° to 100° and even more preferably in a range from 85° to 95°, most preferably of 90°. - a first portion A1 which extends along the longitudinal axis M and which narrows in the direction of the rear end and which has an inner surface and a body edge at the front end, and - a second portion A3 which extends along the longitudinal axis M and which has an inner surface and a body edge at the transition from the first portion A1 to the second portion A3, wherein a virtual connecting line V1 between the body edge of the nozzle opening at the front end and the body edge at the transition from the first portion A1 to the second portion A3 includes with the longitudinal axis M an angle α1 in a range from 15° to 40°, more preferably in a range from 20° to 38°, even more preferably in a range from 20° to 35° and most preferably in a range from 25° to 35°, and/or the inner surface of the first portion A1 includes with the longitudinal axis M an angle α in a range from 10° to 30°, more preferably in a range from 12° to 30°, even more preferably in a range from 14° to 25°, even more preferably in a range from 15° to 20° and most preferably in the range from 17° to 20°, and either a virtual connecting line V3 between the body edge at the transition from the first portion A1 to the second portion A3 and the body edge at the transition from the second portion A3 to the third portion A5 includes with the longitudinal axis M an angle γ1 in a range from 0° to 8°, preferably of 5°, with widening in the direction of the rear end, or in a range from 172° to 180°, preferably of 175°, with narrowing in the direction of the rear end, or extends parallel to the longitudinal axis M, or the inner surface of the second portion A3 widens at an angle γ in a range from 0° to 8°, preferably of 5°, in the direction of the rear end or narrows at an angle in a range from 172° to 180°, preferably of 175°, in the direction of the rear end, or extends parallel to the longitudinal axis M, characterized in that, at the transition or before or immediately before the transition from the first portion A1 to the second portion A3, there is situated at least one further inner surface which extends at an angle β to the longitudinal axis M in a range from 45° to 120°, more preferably in a range from 60° to 110°, even more preferably in a range from 80° to 100° and even more preferably in a range from 85° to 95°, most preferably of 90°.