This study explores the role of cats as symbolic mediators in the Sandplay Therapy process from various areas and perspectives. Initially, we examined the biological characteristics of cats and their relationship with humans. We then investigated the interpretation of cat symbolism from diverse perspectives, including literary and artistic perspectives, geographical and cultural perspectives, religious and mythological perspectives, as well as psychological and contemporary perspectives. Furthermore, we examined how the symbolism of cats is currently interpreted in the clinical process of sand play therapy, drawing insights from literature and real-life cases. Through these investigations, we confirmed that the multifaceted symbolism of cats can be utilized to facilitate the individuation process of clients.