We examined how aspects of intellectual capital influenced various innovative capabilities in organizations. In a longitudinal, multiple-informant study of 93 organizations, we found that human, organizational, and social capital and their interrelationships selectively influenced incremental and radical innovative capabilities. As anticipated, organizational capital positively influenced incremental innovative capability, while human capital interacted with social capital to positively influence radical innovative capability. Counter to our expectations, however, human capital by itself was negatively associated with radical innovative capability. Interestingly, social capital played a significant role in both types of innovation, as it positively influenced incremental and radical innovative capabilities.