In this chapter, we present a summary of the key components of Cognitive Interpersonal Therapy for psychosis. Key to this model is the importance of attachment as the developmental context in which the individual’s understanding of self and others emerges. In turn, this understanding influences cognitive and interpersonal responses to the onset or relapse of psychosis. Cognitive Interpersonal Therapy aims to support adaptation and self-reorganisation after acute psychosis, taking into account the effect of attachment organisation and disorganisation. Our chapter outlines current evidence supporting key components of the model and illustrate the therapeutic principles through a case vignette.