This chapter provides a concise overview of Cognitive Behavioral Therapy (CBT), presenting it as an empirically supported, skills-based psychotherapy that links thoughts, emotions, and behaviors. It outlines core components of CBT—cognitive restructuring, guided discovery, exposure, behavioral activation, journaling, relaxation training, and successive approximation—demonstrating their relevance across clinical presentations. The chapter also describes CBT’s historical origins from Beck, Ellis, and later European developments, clarifying the theoretical foundations that inform its structured, collaborative practice. Mechanisms of change are reviewed from both specific-technique and common-factor perspectives. Evidence is examined showing that targeted interventions (e.g., metacognitive training, insomnia treatment) can reduce specific symptoms, while therapeutic alliance often drives broader clinical improvement. The chapter concludes by framing CBT as a synergy of technique and relationship, setting the conceptual foundation for applying CBT within a symptom-based framework for psychosis.