This study aims to investigate how pre-service EFL teachers' individual innovativeness levels affect their TPACK development during an educational technology course. Employing a quasi-experimental research design, the participants were 59 pre-service EFL teachers. The course followed the Diffusion of Innovation Theory steps. Analyzing the data, TPACK and individual innovativeness scales were implemented as pre- and post-tests. The results showed a significant increase in participants' TPACK, while their individual innovativeness did not exhibit a significant change during the course. Although there was a notable difference in pre-service teachers' initial TPACK levels based on their innovativeness, this difference was no longer significant in the end. Education for TPACK development is critical in bridging the initial knowledge gap arising from differing innovativeness levels.