PURPOSE: To investigate the pragmatic skills of students with autistic spectrum disorders during interaction with their teachers, in regular classrooms of public schools. METHODS: Fourteen students with autistic spectrum disorders, both male and female, with ages between three and eight years (mean=5.9; SD=1.8), participated in the study. As part of the procedure, classroom situations were filmed for the analysis of the children's pragmatic aspects of communication, using the Pragmatic Protocol. Data were statistically analyzed using Wilcoxon, Friedman, Kruskal-Wallis, and Spearman tests, with a significance level of p<0.05 and, in some cases, p<0.01. RESULTS: In average, the number of communicative acts expressed per minute by the teachers (3.4 acts/minute) was superior (p<0.05) to the number presented by the students with autistic spectrum disorders (2.7 acts/minute). The students demonstrated prevalence in the use of the gestural communication mean, with an average of 36.2 occurrences, and of less interactive communicative functions, with an average of 24.1 occurrences. Moreover, there was positive correlation between students' and teachers' acts/minute (p=0.01). It was also observed that age and level of education did not present correlations with communication establishment in the dyads. CONCLUSION: It was possible to identify deficits and abilities of students with autistic spectrum disorders in regular classroom, and to confirm the teacher's influence on the communicative performance of these students. These data may contribute to further explain existing gaps in the literature, and to base therapeutic and educational interventions in the autistic spectrum disorders.