Luminaire housing, comprising a fastening device for fastening a luminaire such as a pendant luminaire to a suspension structure, having at least one fastening structure, the at least one fastening structure comprising: an opening and a slot connected to the opening, which are designed such that a suspension structure introduced into the fastening device via the opening can be moved via the slot into a supporting position in which the suspension structure supports the fastening device in a suspended manner, the slot having a jagged portion (51, 52) for preventing movement of the suspension structure from the supporting position, • the jagged portion having a first and second partial portion (51a, 51b) forming the jagged portion, ∘ the first and the second partial portion (51a, 51b) extending such that, when the suspension structure supports the fastening device in the supporting position, a movement of the suspension structure from the first partial portion into the second partial portion and thus from the supporting position is prevented, and the slot being designed such that the suspension structure can be driven into the supporting position by the weight of the fastening device, characterized in that the angle between the first partial portion and the second partial portion is in a range of 20° to 70°, • and in that the slot has a further jagged portion, the further jagged portion being connected to the opening and the jagged portion, so that the suspension structure introduced into the fastening device via the opening can be moved into the supporting position via the further jagged portion and the jagged portion and the jagged portions (51, 52) can prevent movement of the suspension structure from the supporting position, the slot being formed in an inclined surface of the fastening structure to extend inclined to the horizontal when the suspension structure supports the fastening device in the supporting position. an opening and a slot connected to the opening, which are designed such that a suspension structure introduced into the fastening device via the opening can be moved via the slot into a supporting position in which the suspension structure supports the fastening device in a suspended manner, the slot having a jagged portion (51, 52) for preventing movement of the suspension structure from the supporting position, • the jagged portion having a first and second partial portion (51a, 51b) forming the jagged portion, ∘ the first and the second partial portion (51a, 51b) extending such that, when the suspension structure supports the fastening device in the supporting position, a movement of the suspension structure from the first partial portion into the second partial portion and thus from the supporting position is prevented, and • the jagged portion having a first and second partial portion (51a, 51b) forming the jagged portion, ∘ the first and the second partial portion (51a, 51b) extending such that, when the suspension structure supports the fastening device in the supporting position, a movement of the suspension structure from the first partial portion into the second partial portion and thus from the supporting position is prevented, and ∘ the first and the second partial portion (51a, 51b) extending such that, when the suspension structure supports the fastening device in the supporting position, a movement of the suspension structure from the first partial portion into the second partial portion and thus from the supporting position is prevented, and the slot being designed such that the suspension structure can be driven into the supporting position by the weight of the fastening device, characterized in that the angle between the first partial portion and the second partial portion is in a range of 20° to 70°, • and in that the slot has a further jagged portion, • and in that the slot has a further jagged portion, the further jagged portion being connected to the opening and the jagged portion, so that the suspension structure introduced into the fastening device via the opening can be moved into the supporting position via the further jagged portion and the jagged portion and the jagged portions (51, 52) can prevent movement of the suspension structure from the supporting position, the slot being formed in an inclined surface of the fastening structure to extend inclined to the horizontal when the suspension structure supports the fastening device in the supporting position.