An airplane seat device has a seat base module, comprising at least one main body which is at least substantially implemented from a rigid foam, at least one comfort element disposed on an upper side of the main body, at least one accommodating region for attaching to a tubular support, and at least one fastening element for attaching to the tubular support, wherein the main body has at least two coupling regions, via which the at least one fastening element can be selectively attached to the main body.