This research aims to identify possible positive changes and build on existing experiences in the application of the Individualized program for sensory integration stimulation through the application of visual support in child with autism spectrum disorder. There is a lot of domestic and foreign research on this topic, but there are few that link the stimulation of sensory integration with the application of visual support, which this investigation is exactly focused on. The aim of this study is to gain insight into the functioning of a child with autism spectrum disorder in three sensory areas: vestibular, proprioceptive, and tactile. Based on the evaluation of quantitative and qualitative contributions of the Individualized Program for stimulating sensory integration in these areas with the use of visual support, the intention was to gain insight into possible positive changes in the functioning of a child with autism spectrum disorder and give recommendations for improving the Program for stimulation of sensory integration. For the purposes of this research, an Individualized Program for stimulating Sensory Integration was designed, based on the initial assessment of sensory processing of boy with autism spectrum disorder. During the four months period the program was implemented in the Center for Education Velika Gorica, after which the final evaluation was carried out. The Sensory Integration Dysfunction Assessment System (Viola, 2002, translation and adaptation FulgosiMasnjak, R., Osmančević, L. and Lang, M., 2004) was used in the initial and final assessment. Quantitative data analysis is based on the comparison of initial and final assessment, confirmed the initial hypotheses. It was confirmed that the Individualized Sensory Integration Stimulation Program influenced the improvement of sensory processing in the target sensory areas. Obtained results showed a decrease in the hypersensitivity of the tactile system and a decrease in the insufficient sensitivity of the vestibular and proprioceptive system in boy with autism spectrum disorder. In the qualitative part of this research the method of observation with participation was applied, using diaries of the researcher and the boy's father and the analysis of videos and photographs. Based on the key findings of the research, the contribution of the Individualized Program for Stimulating Sensory Integration through Positive Changes in the Functioning of Boys in the Vestibular, Proprioceptive and Tactile Sensory Areas is visible. The progress in other sensory areas (auditory system), as well as a reduction of undesired behaviors, better eye contact, better focus on activity, better development of independence and attention.