This paper investigates the intonation of topics and focus in Argentinean Porteño. We have found that whereas tonal alignment is phonetically conditioned, pitch height and duration constitute the main cues to express various types of focus in declarative and interrogative sentences; at least four intonational categories seem to be used by our speakers and the relevance of a register feature is discussed. As for topics, they are marked by special tunes that depend on the type of sentence; in particular, the topic tune in questions is the opposite of those found in declaratives.