The aim of study is to investigate the effect of virtual reality application on balance and gait speed in individuals with Alzheimer's Dementia. The study consisted of 32 subjects, which were diagnosed as mild or moderate AD by the neurologist. The balance, fall risks and gait speed were assessed. Training group was trained with games selected from different categories such as balance and aerobic exercises with Nintendo Wii virtual reality device for 6 weeks, 1 session 30 min, 2 times a week.