Growing evidence suggests that the underlying geometry of a visual image is an effective mechanism for conveying the affective meaning of a scene or object. Indeed, even very simple context-free geometric shapes have been shown to signal emotion. Speciﬁcally, downward-pointing V’s are perceived as threatening and curvilinear forms are perceived as pleasant. As these shapes are thought to be primitive cues for decoding emotion, we sought to assess cognitive processing. Using an Implicit Association Test to examine associations between three shapes (downward- and upward-pointing triangles, circles) and pleasant, unpleasant, and neutral scenes, in two studies we found that participants were faster to categorize downward-pointing triangles as unpleasant compared to neutral or pleasant. These ﬁndings were speciﬁc to downward-pointing shapes containing an acute angle. The present ﬁndings support the hypothesis that simple geometric forms convey emotion and that this perception does not require explicit judgment.