The purpose of this study is to examine how background music (BGM) influences the retrieval processes of pictures in memory. In this study, 9 subjects (4 males, 5 females) looked at three different pictures. Each picture was shown with a different piece of music playing in the background. None of the subjects knew that they would be asked about the music later. As a result, although the music was not consciously heard, the music itself has a factor that becomes associated with memory. Therefore, retrieval processes in memory are promoted by music. This indicates that humans use information that may not even be consciously identified to unify their confusing environment.