This study aims to identify the effect of Principals' Technology Leadership on Teachers' Technology Integration in Malaysian secondary schools. This is a crosssectional survey where systematic random sampling was carried out to select 47 principals and 375 teachers from National Secondary Schools in the northern region of Kedah, Malaysia. Two questionnaires were used: Principals Technology Leadership Assessment (PTLA), which is based on the International Society for Technology in Education (ISTE)--Standards for Administrators (2014) was administered to principals, while the Learning with ICT: Measuring ICT Use in the Curriculum Instrument was administered to the teachers from the same schools as the principals. Descriptive analysis was carried out using SPSS Version 25, and SmartPLS was used for inferential analysis. Although the findings showed that the levels of Technology Leadership; the five constructs of ISTE (2014), and Teachers' Technology Integration were at high levels but, there was no significant relationship between Principals' Technology Leadership and Teachers' Technology Integration in the selected schools in the northern region of Kedah. Principals' preparatory programmes should emphasize leadership based on technology to enhance the integration of technology in classrooms. Further research on professional development for principals' is recommended.