Although many scholars have investigated the influence of corporate social responsibility (CSR) in an organization, there has been relatively minimal research regarding the CSR's impacts on employees as well as the underlying mechanisms of it. Considering the research gaps, in the present research, we examine how CSR practices influence attitudes of employees. In particular, we hypothesize that perceived CSR would enhance organizational commitment (OC) of employees through the sequential mediation of meaningfulness of work (MOW) and perceived organizational support (POS). In order to empirically test this, we utilized two-wave time-lagged survey data from 378 employees who work for companies in South Korea. The results show that MOW and POS sequentially mediate the relationship between perceived CSR and OC. The findings suggest that CSR practices could be an active investment which enhances important attitudes of employees, instead of merely being a cost or obligation for firms.