A mental disorder is a pattern of behavior or thought that causes severe suffering or impairs one's ability to function. Due to their inability to lead a regular life, mentally challenged people have been found to have poor oral health. The aim of this study was to assess health care providers’ knowledge, attitudes, and practices regarding oral health care of hospitalized patients at St Giles Psychiatric Hospital in Fiji. A cross-sectional survey design was employed in which 29 health care providers completed a questionnaire that collected socio-demographic information, knowledge, attitude and practices regarding oral health maintenance and care of psychiatric patients. Results revealed that all participants (100%), had knowledge on oral health and oral hygiene practices. However, only 9 nurses (50%) and 5 ward orderlies (63%) reported practicing oral hygiene for in – patients. In fact, 5 (17%) respondents did not view oral hygiene as an important aspect in their patients’ health. All participants (100%) reported unavailability of oral hygiene aids and absence of frequent dental visits, as a key barrier in the oral health care of patients. The results emphasize on the need for a formal training program for health care providers, and clear policies and guidelines about oral health care of hospitalized patients must be instituted.