Emotional capability is an important part of firm capabilities that play a crucial factor in improving the existing innovation performance of the sector, this capability should be expanded by firms to get better performance in the field of innovation. The main objective of this research paper is to find the impact of emotional capability on the innovation performance of the pharmaceutical sector of Thailand. The model of this research study includes many dimensions of emotional capability such as dynamics of display freedom, identification, reconciliation, and experience. The mediating role of product innovativeness was also been identified in enhancing the relationship between emotional capability and innovation performance. For this purpose, most of the data and information of this research were collected from employees and managers of different pharmaceutical firms of Thailand using the technique of a questionnaire survey. The structural equation modeling technique is used to check the validity of hypotheses along with KMO method. The findings of this research paper indicate that all the proposed hypotheses are accepted which means that the independent variable of the emotional capability of a firm can significantly improve the innovation performance.