Dementia indicates a set of symptoms, which contributes to the decline of human's cognitive ability to such an extent that it interferes with his daily life activities. Characteristics of dementia are loss of memory, cognitive ability disorder, difficult concentration and motivation, also causes slow thinking, trouble learning, emotions disorders, work disability affects social relations. Alzheimer's dementia is the most common form of dementia, which includes almost two thirds of the total number of dementia patients over the age of 65. Alzheimer's dementia is a very progressive disease which affects all very important aspects of the life of the affected individual. Although Alzheimer's disease is thought to be"just" a disease of forgetting, it is actually a very serious disease of which, every year, dies large number of people. In America, Alzheimer's disease ranks sixth among the leading causes of death. Alzheimer's dementia is considered as a disease of eldery people, it most often appears in patients from the age of 65 onwards, but unfortunately in some cases it occurs much earlier. The first indicator and symptom of Alzheimer's disease is the loss of short-term memory, followed by progressive cognitive decline. The role of the nurse in the health care of a patient suffering from this disease is very important. The nurse is with the patient from the diagnosis till the final outcome of the disease. Nurse is here to teach, direct and provide the necessary comfort to both the patient and his relatives