The thesis in a systematic and concise way gives an overview of the theoretical knowledge concerning speech disorder, highlighting the disorder in fluency, pace and rhythm of speech, which manifestes in spasms of the muscles of the speech organs ( the lips, the tounge, the soft palate, the vocal chords and the diaphragm) and sometimes, in case of strong stuttering, is followed by spasms of the mimicking face muscles and the involuntary movements of the body ( the arms, the shoulders, the whole trunk). The research begins by defining speech, and highlighting the main characteristics of speech as a way of communication for the preschool aged children. The developmental stages of the speech in children up to the school age are also shown. Through the presentation of speech difficulties in preschool aged children given is the introduction into stuttering as a disorder of the fluency and the rhythm of speech. The theoretical knowledge of the causes of stuttering and the methods of removal of stuttering are also completed with practical knowledge and research whose aim was to answer the hypothesis of why children stutter and the causes of stuttering in children,but also the ways in wich the teachers and the speech therapists can help the children, but also the ways in which the teachers and the speech therapists can help the children with speech disorder. Another aspect of the thesis was the environment the child is in, and the ways in which it can help and the ways in wich it hinders the progress of the stuttering in a child.