There are still relatively few studies on the phonetics and phonology of the indigenous languages of Mexico, and just a minority of them deals with less explored areas like prosody or, specifically, intonation. This study reports a preliminary analysis of Nahuatl intonation, taking into account its phonological characteristics: a) trochaic binary rhythm; b) generation of secondary stress inside rhythmic structures; c) generation of rhythmic groups according to clause structures; d) phonetic syllable lengthening at the end of sentences; e) laryngealization or voicelessness at the end of utterances, and f) vowel lengthening. Data collected by means of different methods, developed in order to obtain authentic and spontaneous utterances, show that different sentence types tend to have specific intonation patterns with many typologically common features and some original characteristics.