The present invention relates to a composition for improving memory including a Cyclin Y (CCNY) inhibitor as an active ingredient. More specifically, the present invention relates to a method for improving memory in a subject comprising administering the composition for improving memory to the subject.The present invention may reveal a CCNY-oriented molecular mechanism with respect to learning and memory, help understand causes of brain diseases associated with memory problems, and ultimately be applied in the treatment and diagnosis of brain memory disorders such as dementia.
