The present invention relates to a pharmaceutical composition for the prevention or treatment of degenerative neurological brain disorders, and more specifically relates to a pharmaceutical composition for the prevention or treatment of degenerative neurological brain disorders such as Parkinson's disease, Alzheimer's dementia (senile dementia), stroke, Lou Gehrig's disease, Pick's disease, Creutzfeldt-Jakob disease, Huntington's disease, progressive supranuclear palsy, spinocerebellar ataxia, cerebellar atrophy, multiple sclerosis, post-traumatic stress disorder and amnesia, which composition contains a paraben compound constituting an active ingredient having effects that are useful in combating oxidation to remove active oxygen, suppressing cell-death, improving impaired movement and enhancing declining memory.