Attention Deficit/Hyperactivity Disorder (ADHD) is a prevalent neurodevelopmental condition that often leads to impairments in visual-motor integration (VMI), a function critical for the successful execution of many everyday tasks. Identifying and quantifying the differences in VMI performance between children with ADHD and their typically developing (TD) peers can contribute to a better understanding of the underlying neural mechanisms and support the development of objective assessment tools. Based on this motivation, we conducted an experiment involving 13 children with ADHD and 12 TD children who were asked to perform a static grip force control task in this study. Simultaneously recorded eye gaze and grip force were analyzed to assess their VMI abilities. The analysis revealed more obvious synchronization between eye gaze and grip force in the TD group compared to the ADHD group. Specifically, children with ADHD demonstrated greater variability in both eye gaze and grip force control. These findings suggest that the analysis of multimodal physiological data may offer a reliable method for evaluating the visual-motor integration abilities of children with ADHD.