In the 1920`s, Husserl developed his phenomenological social ethics in his two manuscripts on “Gemeingeist” and his five articles on “the ethics of renewal”. It is the aim of this paper 1) to clarify the basic structure of Husserl`s phenomenological social ethics, 2) to highlight the significance of phenomenological social ethics, and 3) to delineate some important tasks that phenomenological social ethics has to solve in the future. Section I shows that there are various dimensions to phenomenological ethics such as empirical phenomenological ethics, regional phenomenological ethics, formal phenomenological ethics, and transcendental phenomenological ethics. Section 2 and Section 3 clarify, respectively, the general structure of phenomenological social ethics developed 1) in Husserl`s manuscripts on “Gemeingeist” and 2) in his five articles on “the ethics of renewal”. Section 4 shows the significance of phenomenological social ethics developed in the manuscripts on “Gemeingeist” and the five articles on “the ethics of renewal”, on the one hand, and the future tasks that this phenomenological social ethics has to solve, on the other hand.