This chapter introduces the operation Remove. The starting point is the question of how to account for conflicting structure assignments in syntax. After excluding the standard means of syntactic movement for certain cases, several predecessors and alternatives of Remove are discussed (among them tree pruning, S-bar deletion, and exfoliation). In addition, the concept of coanalysis is critically evaluated. The core of the chapter is devoted to introducing Remove as an elementary operation that is the complete mirror image of Merge in that it triggers structure removal rather than structure building, and that it obeys exactly the same restrictions (with respect to triggers, strict cyclicity, etc.). On this basis, the different effects that Remove has for removal of phrases versus removal of heads are illustrated. Some general consequences are discussed next, concerning short life cycle effects, incompatibilities with other constraints (in particular, this holds for the Projection Principle), and semantic interpretation.