Long-term sickness absence has considerable impact on social functioning, families involved, the employer, and society as a whole. Preventing long-term sickness absence and increase the likelihood of return to work (RTW) are critical concerns for industrialized countries across the world. Motivational factors contributing to RTW and maintenance of work participation are therefore of importance to explore in order to get the person back to work after long-term sick leave. Motivational interviewing (MI) is an empirically validated psychological approach that may be particularly useful in a RTW context. Even though MI has been widely studied and is considered a flexible intervention strategy in different domains, its effectiveness in improving RTW has not yet been studied.