What is the political relevance of friendship? This chapter considers this question in light of Plato’s Lysis by focusing on the notion of friendship—philia—in a political perspective, with a view to how this dialogue reveals the political relevance and necessity of friendship. The argument is that in the Lysis Plato displays friendship as vital to the good of the virtuous political community of the polis. The chapter begins by considering how relationships of friendship can be said to be presented at the dramatical level of the dialogue, that is to say, between some of the persons participating in, or at least present at, the discussions in the dialogue, especially surrounding and between the two children: Lysis and Menexenus. To this relationship the chapter devotes a substantial analysis, before turning to explore the arguments concerning the concept of friendship. In this section the chapter investigates whether, and how, this can be said to resonate with what is happening at the more dramatic level of the Lysis. In conclusion the chapter considers the connection between friendship and the good, more specifically the good of the polis.