Abstract: This paper is a literature review of the psychogeriatric specialty and describes the clinical role, practice and knowledge of the psychogeriatric nurse. Literature reviews provide a useful means for evaluating what is currently known and understood in a particular area of interest to help nurses' build current opinion into practice. Psychogeriatric nursing is a specialised field of practice that focuses on the mental health needs of people over the age of 65 (including younger people who have acquired needs that are similar in 'like' and age and 'interest'). The literature asserts the urgent need to develop the role and practice of the psychogeriatric nurse in order to address the complex needs of our ageing population in areas such as home care, hospitals, primary health, and long term care institutions. The findings highlight aspects of nursing care that are essential to the role and practice of the psychogeriatric nurse. Knowledge that is necessary for best practice in psychogeriatric nursing care is drawn mainly from the field of general psychiatry and gerontology but also from general medicine, psychology, neurology, and disability. Nurses' working with older adults affected by psychogeriatric conditions must possess a broad knowledge of physical and mental health issues that affect the elderly, including also knowledge and understanding of psychosocial risk factors that can also have an impact on the health and behaviour of older people and their carers. Despite these literal assertions however there appears to be a dearth of literature available to support the requirements for developing the psychogeriatric nursing specialty in clinical practice, research, and education. The author notes that authorities in this specialised field of practice generally agree that with an increasing aging population looming in the future more research in the field of “old age psychiatry” will be critical.