Abstract
This research aims to investigate the implementation of Problem-Based Learning in learning English at the 10 th grade of Islamic High School in Mataram. This study involves an English teacher and 34 students of class X IPS 1 in Islamic High School in Mataram as the participants of the study who were selected purposively. Being qualitative in nature, this study used several techniques of data collection: observations, interviews, questionnaire. The results showed that: the implementation of Problem-Based Learning is not successfully implemented due to some teacher and student’s problems which are difficult to pinpoint what was interesting about the topic that will be taught in the class, needed more time to implement the PBL model, difficulties in understanding and solving problem, and student’s lack of confidence. However, according to the interviews and the result of questionnaire, students respond positively to the implementation of Problem-Based Learning in class.