To carry out successful teaching in the micro-teaching class, students need to develop a good lesson planning. The lesson plan functions as a guideline in teaching in order to achieve the learning objectives and successful teaching. This study focuses on the extent of the inconsistencies and factors that influence the inconsistencies. Therefore, the researcher applied a qualitative descriptive method to analyze the problem. Data were collected through observation, interviews, and documentation. This research was conducted at the Universitas Islam Negeri Walisongo Semarang, with fifth-semester students consisting of three English Education Department classes. The results of the analysis of the extent to which the inconsistency between the pre-service teachers’ lesson planning and their performance in the micro-teaching class is 56% of the inconsistency from 100%. and factors that cause inconsistencies, among others; the time provided is very short to explain the material, do teaching practice via video, media limitations at home when making teaching videos, do not have students, lack of preparation in teaching practice, nervousness faced by pre-service teachers, also lack of confidence. The pedagogical implications of this research can increase knowledge about the extent of inconsistency and the factors that affect the inconsistency between the pre-service teachers’ lesson planning and their performance in the micro-teaching class.