Recent literature explores the determinants of environmental innovations (EI) but rarely addresses obstacles to these innovations. To our knowledge, no previous study accounts for antecedents of EI to explore the various perceived barriers to EI for small and medium-sized enterprises (SMEs). Noting the importance of SMEs in European economies, this article identifies the extent to which SMEs perceive barriers to environmental innovations, considering their type, number, and intensity. With a merged data set of 435 French SMEs, we investigate different perceptions of environmentally innovative SMEs, compared with those of technologically innovative SMEs and non-innovative ones, using a multiple treatment model that integrates the antecedents. We thereby analyze SME CEO's perceptions of barriers to EI. The barriers are not only more numerous but also more important for SMEs that engage in environmental innovation activity compared with those that have introduced only technological innovation or those that do not undertake any innovation activity.