This research aims to examine the influence of Spiritual Leadership on Organizational Citizenship Behavior for the Environment with Self-efficacy as a mediator. This type of research uses quantitative research methods with a causal associative approach. The sample was taken using a simple random sampling technique, namely 136 respondents from a total population of 205 employees at Harapan Keluarga Mataram Hospital, Lombok. Data analysis uses the SEM-PLS technique using SMART PLS software. The results of this research indicate that Spiritual Leadership has a significant positive effect on Organizational Citizenship Behavior for the Environment. Self-efficacy can mediate the positive influence of Spiritual Leadership on Organizational Citizenship Behavior for the Environment. Therefore, management needs to adopt Spiritual Leadership in an effort to encourage their employees to behave more pro- environmentally on a discretionary basis because in aggregate it can benefit the natural environment and the organization's finances.

Keywords : Spiritual Leadership, Organizational Citizenship Behavior for the Environment, Self-Efficacy.