Planning a lesson remains a challenging task for the teachers. The transition from a student into a pre-service teacher and turn out into an effective teacher is a challenging task in the teaching field. We all know the nexus between the significant roles of a lesson plan in an effective teachinglearning process. This study aims to analyze the pre-service trainee teachers' attitudes, ideas, and obstacles in designing lesson plans. The sample involved pre-service teachers who enrolled in a teaching practice course at the College of Education and Arts Northern Border University, Kingdom of Saudi Arabia. Fifty pre-service trainee teachers participated in the research and the data collected through casual informal interviews, daily and weekly lesson plans. This study used a methodological triangulation research design that combined ways of quantitative and qualitative data collection. This method offers better and localized insights about pre-service teachers’ attitudes of the lesson plan designing. Also analyze the problems in organizing and arranging the information related to the lesson or topic. The finding of the research revealed that the pre-service trainee teachers were well aware of lesson planning and its importance but, they found some problems during their planning.