摘要：The paper aimed to illustrate an idea about the feasibility of a peculiar aircraft, i. e., a 5th generation light fighter. At first, a short description of previous "generations" of jet fighter is given, introducing the interest that has always been originated by the concept of "light fighter" for every of the first four fighter generations. The derivation of the first idea of a new 5th generation light fighter is then described. Then to further investigate the feasibility of idea, a conceptual design study has been driven up by utilizing peculiar tools, both for quantitative and qualitative (i. e., the aircraft layout definition) evaluations. With the further support of preliminary study of subsystems, the result shows the feasibility of the concept.