Livia Amaradita Putri Ganendra.  K2218049.  THE  IMPACT  OF WRITING REFLECTIVE DIARY DURING FIELD EXPERIENCE ON TEACHING PRACTICE OF EFL PRE-SERVICE TEACHERS: A NARRATIVE INQUIRY OF PRE-SERVICE TEACHER PERCEPTION. Thesis of the English Education Department at Faculty of Teacher Training and Education, Sebelas Maret University, 2025.This study explores the impact of writing a reflective diary during field experience on the teaching practice of EFL pre-service teachers: a narrative inquiry of pre- service teacher perception. This study involved three pre-service English teachers who had undergone teaching internships in junior and senior high schools in Surakarta. Using a narrative inquiry approach, data were collected through the reflective diaries that had been written by the EFL pre-service teachers during the field experiences, questionnaires, and interviews to gain valuable insights into the experiences, opinions, and practices of prospective English teachers related to the impact of writing reflective diary during field experience on teaching practice of EFL pre-service teachers: a narrative inquiry of pre-service teacher perception. Data were analyzed using thematic narrative analysis. This study reveals the types of writing reflective diaries that record EFL pre-service teachers' experience during the teaching practicum program and how the experience of writing reflective diaries affects the teaching practicum as perceived by pre-service teachers. Pre-service teachers viewed changes in a number of areas, including teaching, self- improvement, self-assessment, and self-confidence. This study highlights the types of writing reflective diaries that record EFL pre-service teachers' experience during the teaching practicum program and how the experience of writing reflective diaries affects the teaching practicum as perceived by pre-service teachers. However, this study also identifies several challenges in writing reflective diaries, the benefits of writing reflective diaries, short-term observations, and limited scope of variables.