ObjectivesWork engagement is an essential factor in improving employee performance. However, no reviews on the work engagement of psychiatric nurses have been conducted to date. This study aimed to examine the current status of research on the work engagement of psychiatric nurses and identify salient factors.DesignA scoping review.MethodsThis review adhered to the established scoping review methodological guidelines and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Scoping Reviews checklist. The inclusion criteria were based on nurses, work engagement and psychiatric settings without language or date restrictions. Regardless of the methodology or study design, research studies related to the work engagement of psychiatric nurses have been included. A systematic search was conducted in MEDLINE, CINAHL and PsycINFO from the inception of each database, with the search strategies being set by an information specialist. The deadline for the search was 15 February 2023.ResultsThe study included 12 studies. All studies have been published since 2013. The study designs included cross-sectional (n=10), longitudinal (n=1) and intervention (n=1) studies. The impacts of work engagement were classified into (1) attitudes towards patients, (2) attitudes towards work, (3) mental health and (4) quality of care. Factors influencing work engagement were classified into (1) demographics, (2) workplace factors, (3) individual factors and (4) patient factors.ConclusionWork engagement of psychiatric nurses has lately gained attention, although data are limited because most studies used a cross-sectional design. Psychiatric nurses with higher work engagement showed positive outcomes. Workplace and individual factors can potentially improve their work engagement. The findings can assist nursing managers in enhancing psychiatric nurses’ work engagement and, consequently, their performance.