Stuttering is a multidimensional disorder in which the flow of speech is interrupted by repetitions of words, syllables and sounds, prolongations of sounds or abnormal pauses, and tense pauses. Also, secondary behaviors, or unusual facial and body movements associated with speech exertion, may be present. Stuttering is a complex disorder that not only affects an individual’s speech, but can affect a whole range of aspects of an individual’s life, such as psychological and social difficulties. Psycho-social difficulties are manifested in the fact that anxiety is a common occurrence in people who stutter. The growing body of evidence of anxiety in people who stutter has led to a change in the diagnostic criteria in DSM-V, since in DSM-IV social anxiety disorder could not be diagnosed if it was due to another disorder - such as stuttering. Numerous studies show a significant association between anxiety and stuttering, which is present in all age groups, especially in adulthood. Through the results of numerous studies that have examined the connection and relationship between anxiety and stuttering, a significant level of anxiety in people who stutter has been revealed, which significantly impairs the quality of life and general mental state of individuals. Also, elevated levels of anxiety are particularly pronounced in people with more severe stuttering and may contribute to the worsening and persistence of the disorder. Furthermore, given the impact of anxiety on one's own speech and stuttering, the importance of including cognitive-behavioral therapy as an effective and scientifically based method, which is based on the elimination and prevention of social anxiety in people who stutter, was emphasized. The UTBAS scale shows the impact of negative attitudes and thoughts about stuttering on an individual and its importance and wider application in diagnosis and therapy is further explained.