In the context of globalization, innovation is considered as a key factor for enhancing the competitiveness of firms. Nowadays, it is widely accepted that Portuguese firms face an increasing competitive environment, which is characterized by internationalization and globalization. In this sense, it becomes important to analyze the determinant factors of innovation capability of firms. This paper aims to identify and analyze the degree of importance of the determinant factors of innovation capability of Portuguese industrial firms. The data obtained through the 2rd Community Innovation Survey (CIS II) conducted by EUROSTAT, is used in a linear regression model. The entrepreneurial innovative capability, measured as product innovation, is considered as the variable answer, in the estimation process of a Logit function. The paper presents an innovative contribution since it uses a set of five determinant factors of innovation capability of industrial firms, at a product innovation level. Technological capacity, dimension of the firm, activity sector, market orientation and location of the firm, are considered as determinants factors of innovation capability of the firms. The results of the joint analysis provide the identification of stimulating factors and restraining factors of the entrepreneurial innovative capability of a selected sample of Portuguese industrial firms. Under a Schumpeterian approach, the paper ratifies that large enterprises are more prone to innovate than small enterprises. The dimension plays a role, in terms of the strategic conduct implemented by small firms, which are not so prone to innovate, due to its small dimension. Benchmarking the Portuguese case is particularly important, because small industrial enterprises face restraining conditions imposed by outsourcing contracts that are established between small producers and leading international buyers. This restrains, broadly, the entrepreneurial innovative capability of small industrial enterprises.