Auditory processing implies mechanisms and processes that enable active and passive observation, tracking, identification and discrimination of acoustic signals, so as the ability to successfully locate and discriminate sounds, listening attention and memory, acquiring phonological awareness, alligation of auditory signals, auditory comprehension and interpretation of acoustic stimuli. These skills greatly enable the development of communication, language and speech in human population. In view of the above, auditory processing related difficulties are associated with certain linguistic-language impairments, one of which is stuttering. Theoretical basis of that assumption is that there are pathways which lead to auditory recognition and voice mapping, and all that leads to gathering information which are used to form articulation movements for speech production. Furthermore, there are certain evidence that techniques which are based on manipulation of auditory feedback lead to a reduction of stuttering behavior, or its complete elimination. That finding supports the theories that lack in auditory processing may be associated with stuttering. The aim of this study was to determine whether there is a statistically significant difference between 9 adults and control groups on the PSP-1 test that examines auditory processing. Second aim was to define whether there is a difference in auditory processing with regard to the left and right ear in adults that stutter. Finally, third aim was to discuss whether there is a link between stuttering severity and performance on the PSP-1 test. The results showed that the test group had significantly lower performance on Filtered-words test, Speech-in-noise-test, and Dihotic-sentence-listening-test and that there isn't statistically significant association between stuttering severity and performance on PSP-1 test. Finally, there was a significant difference in auditory processing between the left and right ear in adults who stutter, but only on one of the four subtests (Test of filtered words), so this difference was not considered.