Children with typical development already during early childhood begin to acquire their mother tongue and communicate verbally for various communication purposes/functions. If children, on the other hand, communicate for a small range of different communication functions and in general rarely initiate communication and respond inconsistently to communication attempts of their communication partners, all of this may point to an autism spectrum disorder (ASD). Earlier research shows that such deviations in social communication do not decrease even when children with ASD have developed verbal abilities. However, in addition to the (a)typicality of the developmental profile, the child's personality traits, as well as the parents' personality traits, can influence the characteristics of communication exchanges between the child and the parents. Therefore, the aim of this paper was to determine the differences in the use of certain verbal communication functions between children with typical development and children with ASD, uniform in vocabulary size, and to determine the connection between certain personality traits of the mother and communication functions of the child. 20 typically developing children and their mothers and 20 children with a diagnosis of ASD and their mothers took part in the study. Children's verbal communication functions were analyzed for each child's statement using transcripts constructed from videos of semi-structured activities of children and mothers. The mothers filled out the IPIP-NEO-120 personality trait questionnaire, which consists of 120 items that assess 5 personality dimensions of the five-factor model: Neuroticism, Extraversion, Openness to experiences, Agreeableness and Conscientiousness. The results of this study show that typically developing children achieve a higher total score in the number of verbal communication functions of commenting than children with ASD during interaction with their mother. No statistically significant correlation was obtained between the average values on the domains of the mothers' personality and the number of communication functions of initiation and response of the children, except for the domain of Conscientiousness. Namely, a statistically significant positive correlation was obtained between the mother's Conscientiousness and the number of children's communication functions of response, but only for the group of children with ASD. No clear explanations of these results were found in the literature, which indicates a small number of research papers dealing with this topic and the need for more detailed research. This would enable the acquisition of clear conclusions that would certainly have important clinical implications in terms of cooperation with parents of children involved in therapy with the aim of improving functional communication.