In this study, it is aimed to investigate the relationship between life-long learning tendencies and Technological Pedagogical Content Knowledge of the teacher candidates. The design of the study is based on the correlational survey model. The participants of the study are 271 senior teacher candidates studying at Ondokuz Mayis University Education Faculty in 2018-2019 academic period. Purposeful sampling method was used in the study. Our first result indicates that there is no significant difference in terms of gender for Techno-pedagogical Education Competency of the teacher candidates and regarding its sub-dimensions yet there is a significant difference for Lifelong Learning Tendency of teacher candidates in favor of females in the context of Independent Samples T- Tests. Furthermore, One-Way ANOVA tests show that there are significant differences for all the sub-dimensions of "Techno-pedagogical Education Competency" as well as for its whole structure and along with that, "Lifelong Learning Tendency" of teacher candidates display differences at least between two groups as regards to their departments. In this study, it is found out that there is a moderate correlation between Techno-pedagogical Education Competency and Lifelong Learning Tendency levels of teacher candidates. There are also moderate correlations with the sub-dimensions of Techno-pedagogical Education Competency and Lifelong Learning Tendency given as Exertion, Ethics, Proficiency and Design with Lifelong Learning Tendency of teacher candidates.