Although the development of communication skills in children suffering from Disorders of the Autistic Spectre generally progresses in the same way as in children with typical development, it is however impeded in many ways at various stages of growing up, influenced by the mental ability of the children and the degree of the disorder. As a result, the course of development of communication skills in children suffering from Disorders of the Autistic Spectre is differentiated in comparison with the expected course of development. The aim of this study is to explore the level of linguistic skills of a pre-school child with a disorder of the autistic spectre. In order to explore the above mentioned aim, a qualitative approach was used. More specifically, the child was evaluated through certain linguistic tests whose organization is based on the existing international research. Moreover, a non-structured observation was used in order to record the pupil's difficulties as linguistic tests were being completed and locate any possible avoidance strategies as well as record the time needed to complete the activities. Finally, a structured interview of a child?s parents was carried out in order to record all the personal characteristics of a child and fully sketch out the case that is being studied. The results that came out of the qualitative analysis of the data prove the existence of major difficulties in the linguistic field. More specifically, matching and oral response tests proved to be areas of great difficulty. However, the performance level in vocabulary tests with the use of pictures was significantly higher. The findings of the research lead to the conclusion that the linguistic characteristics of speech (phonological, morphological, semantic) of children with Disorders of the Autistic Spectre are significantly inferior compared to the expected developmental course. Moreover, the importance of the use of pictures should also be highlighted as the activities that included picture were the only ones at which the child?s performance level was significantly better.