The aim of this article is to frame a philosophy of practical knowing for Action Research. In the context of the extended epistemology well-adopted by Action Research, there has not been much elaboration of what practical knowing involves. In a third-person mode, this article explores what Aristotle, Husserl, Schutz, Dewey and Lonergan have said about practical knowing, and presents four core characteristics. These characteristics are: 1) the everyday concerns of human living, 2) how practical knowing is socially derived and constructed, 3) how its uniqueness in each situation needs to be attended to and 4) how practical Action is driven by values and is fundamentally an ethical process. In third-person mode, these four characteristics are framed as a framework of a philosophy of... practical knowing for Action Research.