Advances in modern medicine, such as organ transplantations and the appearance of HIV (human immunodeficiency virus), have significantly increased the patient cohort at risk of developing chronic superficial and life-threatening invasive fungal infections. To tackle this major healthcare problem, there is an urgent need to understand immunity against fungal infections for the purposes of vaccine design or immune-mediated interventions. In this chapter, we give an overview of the components of the innate and adaptive immune system and how they contribute to host defence against fungi. The various cell types contributing to fungal recognition and the subsequent stimulation of phagocytosis, the activation of inflammatory and B- and T-cell responses, and fungal clearance are discussed using the major fungal pathogens as model systems.