Although extant empirical research on workplace deviance has traditionally focused onbehaviours that threaten the well-being of an organization and/or its members, however,there is a paucity of research investigating constructive deviant behaviours, which play asignificant role in creating positive organizational change. Drawing upon social exchangetheory, this study examined organisational trust as a mediator of the relationship betweenperceived organisational support and constructive deviance. The data was obtained from asample of 212 full-time employees of a public sector organization in Nigeria. Results frompartial least square structural equation modeling (PLS-SEM) analyses revealed that perceivedorganisational support was positively related to constructive deviance. In addition, the resultsdemonstrated that organisational trust partially mediated the relationship between perceivedorganisational support and constructive deviance.Keywords: Constructive Deviance; Workplace Deviance; Organisational Support;Organisational Trust; Social Exchange Theory.