This study explores the relationship between employees’ mindfulness and voluntary pro-environmental behaviour at the workplace, and also the mediating role of connectedness to nature. Based on 421 online survey responses, confirmatory factor analysis was conducted to establish the validity and reliability of the conceptualised model. Pearson correlation was undertaken to study the relationship between variables, and mediation was examined using the PROCESS macro of Hayes. Findings were encouraging and employee mindfulness was found to be positively influencing voluntary proenvironmental behaviour, and the mediation analysis indicated the intervening role of connectedness to nature in this relationship. This study could be the first to examine, how mindfulness through connectedness to nature motivates employees to engage in voluntarily pro-environmental behaviours. The findings could be of much interest to organizational change champions seeking to encourage employees to voluntarily participate in pro-environment behaviours.