This book aims to guide students and all individuals who work in medical field especially in clinical laboratory. This book is divided into 14 chapters, including an introduction to MLT, procedures done as MLT, a scientific presentation, a job interview, and a scientific summary. Chapter 1 will focus on the introduction of MLT and what kinds of jobs they do as MLTs. Chapters 2 until to 14 aim to improve English communication skills with colleagues, patients, and other professionals related to MLT. We are also thanking our colleague from Medical Laboratory Technology for their constructive suggestion (Dr. Anita Kurniati, Aliyah Siti Sundari, M.Si). Lastly, we are hoping that this book will help readers sharpen their English communication skills in the medical laboratory and general medicine settings.