“Internal relation” is a significant term in both Wittgenstein’s early and later philosophy. The term is used in relation to many problems, including our topic here, “aspect-seeing.” Some scholars have attempted to present a persuasive interpretation of this terminology; however, Wittgenstein’s remarks on “aspect-seeing” somehow thwart their approaches. The obstacle lies in the relata involved: Which terms are connected by an internal relation in the perception of an aspect? In this paper, I review the existing interpretations and present two proposals, one of which is conservative and the other slightly more radical. I argue that Wittgenstein makes divergent use of the distinction between “internal/external relations,” and that this may reveal the potential ambiguities of the words “internal” and “relation.”