Most countries stress that preparing quality teachers for twenty-first century students is an essential task for teacher training institutions. Besides the skills for how to teach subjects effectively, teachers should also know how to integrate digital technology into their teaching. Several studies have been done based on the TPACK framework. Some of these studies use this framework for specific subject domains. In this study a generally applicable instrument for measuring TPACK was created. The aim of the paper was to validate the created instrument and to find out how pre-service teachers perceive their technological, pedagogical and content knowledge regarding the TPACK framework in Estonia, in a technologically highly developed country where technology is broadly used in general education. Conducting factor analysis all items with technology merged into one factor meaning that young generation perceives technology already integrated with content and pedagogy. The results indicate that pre-service teachers lack pedagogical knowledge, but they perceive that they are good at integrating technology into their teaching. Differences in perceptions were also found according to gender, age and curricula.