Economical pre-chamber spark plug

A pre-chamber spark plug, comprising:

• a housing extending along a longitudinal axis;
• a middle electrode with a first noble metal body, which has a first end spark face, the middle electrode extending along the longitudinal axis within the housing;
• a ground electrode with a second noble metal body, which has a second end spark face, the ground electrode fixed within a through hole extending through the housing laterally with respect to the longitudinal axis;
• an insulator within the housing which electrically insulates the middle electrode with respect to the ground electrode;
• and
• a cap, which together with a part of the housing, defines a pre-chamber,
• wherein the first end spark face and the second end spark face are arranged oppositely at a distance from one another,
• wherein the first noble metal body is arranged on a retaining element which is connected to the middle electrode, and
• wherein the retaining element is configured as a ring comprising a middle opening in which the middle electrode is arranged.