The mind-body relation and the individualization are the two potential implicit problems of Freud's unconscious theory. The concept of the flesh which exists both in the visible and the invisible proposed by Merleau-Ponty can provide a new perspective to resolve the problems. This concept can be split into the flesh of the body and the flesh of the world, showing the features of reversibility and generality. In this paper, we attempt to re-interpret Freud's unconscious problems through the flesh. We regard Freud's unconscious as the invisible, the conscious as the visible, and the human body as the bridge that integrates the unconscious and the conscious into an identical interpretative system. In this way, we consider the unconscious, the conscious and the body as three dimensions of the flesh in which they transcend themselves. At the same time, we also try to integrate the nature and the individual into the flesh. As a result, the depth of an individual can be seen as a part of depth of the nature, and the unconscious belonging to the individual is, in essence, a part of the unconscious belonging to the nature.