It is known that the development of the understanding of the meaning of idioms in the acquisition of typical language is a continuous process that is present from the end of childhood and expands to adolescence, more precisely between 7 and 11 years of age. Studies have shown that the development of the understanding of figurative language is simultaneous to the development of Theory of Mind (ToM). Other studies suggest that individuals with Autism Spectrum Disorder (ASD) frequently perform poorly on both tasks. However, due to the lack of studies on the development of figurative language in individuals with ASD, it is almost impossible to draw conclusions about the path of the development of these abilities. Thus, this research proposes the application of a questionnaire containing 10 previously selected idiomatic expressions, with the objective of investigating the comprehension of these expressions by children with ASD, who are being attended by a specialized service. Data were recorded and analyzed statistically and descriptively. The results indicate that children with ASD performed well below that of children with typical Development matched for age and sex, with respect to isolated idioms. However, when these expressions are inserted in context the performance of the G1 participants improves significantly, without reaching the same level of G2 participants. On the other hand, there were no significant differences in performance in ToM activities between the two groups. Also, no relevant correlations were found between ToM performance and comprehension of idioms. Thus, we can discuss the existence of associations between the skills of metrepresentation and the understanding of figurative language. Factors that should be taken into account are the difference in schooling between the groups which probably generates a difference in the children's social linguistic experience and, therefore, differences in their performance. In this sense, the pairing of age groups may not have generated the desired similarity. However, the differences in performance with and without context agree with the literature when indicating the importance of the social aspects of language. Descriptors: autism spectrum disorder; idioms; language; theory of mind; child. Essa dissertação está de acordo com as seguintes normas, em vigor no momento desta publicação: