Moral distress among nurses is well researched and well documented, but there is limited research on the moral distress experienced by care leaders, who serve as intermediaries between patient care nurses and higher levels of administration. Healthcare professionals experience moral distress daily in the context of older adult care. The aim of this scoping review was to evaluate recent literature on moral distress in older adult care with the goal of revealing how care leaders’ experiences of moral distress in older adult care have been conceptualized in earlier studies. The research questions were: How is the concept of moral distress as experienced by care leaders in older adult care defined in the existing literature? How is the concept of moral distress conceptualized in the literature? The research has been conducted in accordance with the guidelines set forth by the Finnish National Advisory Board on Research Ethics TENK. We saw that consensus on how moral distress is defined is lacking. Care leaders in older adult care experience substantial moral distress, which could be linked to the duality of their leadership role. Moral distress can be caused by a complex interplay of individual and structural factors and the challenging complex moral issues inherent to older adult care. Moral distress could impact care leaders’ emotional health, job performance, overall job satisfaction and result in higher turnover rates, absenteeism, decreased quality of patient care, and increased organizational costs. Addressing moral distress on the individual, team, and organizational levels is crucial for enhancing care leaders’ well-being and improving the overall quality of care for older adults. A focus on the identification of strategies whereby care leaders can be supported, exploration of the long-term effects of moral distress on healthcare professionals in general, and the organizational outcomes associated with moral distress should be included in future research.