There are various causes of deafness which can appear at any stage of our lives. Therefore, different complications and consequences may be observed. Damaged hearing influences the way of communication and has a significant impact on every area of a child's life. The aim of this study was to evaluate general fitness of children who are hard of hearing at a moderate level as well as to demonstrate that hearing impairment can influence a child's physical development. In order to achieve these goals, the research was conducted in a group of 105 children at the age of 10-12, the average age 11. The experimental group consisted of 42 hearing-impaired children (14 girls and 28 boys). The control group was comprised of 63 hearing children (36 girls and 27 boys). General fitness was measured with the use of The Eurofit Physical Fitness Test Battery. The results showed that children with a hearing defect achieved worse results in almost all components of general fitness. The only test in which the group of hearing-impaired children proved to be slightly better than the group of hearing children was the static strength test. The research on hearing-impaired children who were using hearing aids as well as those who were not revealed that the use of a hearing aid can have a positive influence on test results.