||Alzheimer's disease (AD) is a type of disease which is characterized by a disorder of the brain in which the memory and thinking skills are slowly destroyed. This makes it difficult for a person to carry out the simplest task. It is also a type of dementia. Until now still there is no perfect cure for Alzheimer's disease. Drugs are available only to reduce or eliminate the symptoms of this disease. In this review article, Alzheimer's disease will be explained briefly along with its symptoms. Most importantly, since the treatment related to this disease is very crucial, plants or plant extracts which can be used to treat Alzheimer's disease will be discussed.