The present application describes a chassis for an air passenger seat for an aircraft. According to one exemplary embodiment, the chassis has at least two first lateral parts, and a first and a second spar. The second spar is implemented in the foot region of the air passenger seat and, in addition to its supporting function, ensures baggage is secured. The assumption of additional objects by the chassis construction advantageously allows an air passenger seat to be manufactured with minimum material outlay and therefore weight outlay.