This article reconsiders the mechanism involving our usual experiences regarding the passage of time， and examines the modality of time that is perceived as more essential from the viewpoint of clinical psychology. How is it that a person perceives the progress of time? How is it that a person maintains the state of being “I"? This paper approaches these questions through the concept of time continuity. The conclusion is based on the fact that the presence of other persons has ad eep connection with our experience of time. For example，b ased on Winni司 cott's theory， a mother makes a large contribution to the occurrence of her child's time. The bond we have with another person brings the time with others and the continuity of the existence of self. Moreover， some studies on time perspective reveal that adolescents who have clear time perspectives are able to maintain intimate relationships with their friends. One of the roles of psychotherapy is the integration of a client's various experiences in the “here and now" with those of at herapist. Moreover，t his is at ask based on the relationship between a client and a therapist. An encounter between a client and a therapist provides both with af ramework for their experiences of time，a nd they co・operativelycreate time continuity in the therapy room. It is these mechanism that constitute the process of transformation for a client.