The background of the study in this research is based on the phenomena that not all students were interested in learning reading. Most of them just sat and listened as if they understood the lesson. So, it was very difficult for me to know who really understood the lesson and who didn’t. Then, the writer initiated to divide the class into small group discussion and every student was responsible for one assignment. Consequently, their role in learning reading was better than before. The writer use jigsaw as a technique to solve the problem.
The problems of this research can be stated as follows:
1. How is the implementation of Jigsaw Technique to improve students' reading skill on narrative text?
2. How is the improvement of students' reading skill on narrative text after being taught through using Jigsaw Technique?

Its purposes are:
1. To describe the implementation of Jigsaw Technique to improve students' reading skill on narrative text.
2. To find out the improvement of students’ reading skill on narrative text after being taught through using Jigsaw Technique.

The implementation of Jigsaw technique in teaching reading at SMP N 23 Semarang was Classroom Action Research which was aimed at improving students’ in reading skill. This research was conducted in cycles that consist of pre-cycle, two cycles of treatment. Pre-cycle to get students base score in reading skill, two cycles of treatment are the teaching and learning processes using jigsaw technique and the assessment tests.
The findings of study show that using Jigsaw technique can improve students’ improvement in reading skill. This is proved by students’ comprehension test that improved in every cycle. In this research, the researcher took a test of their improvements in each cycle. From pre cycle showed that students’ improvement was 61. 7 it means that still low ability in some students, but in the cycle I showed that there was increasing students’ improvement up to 66. 1. And from cycle II the students’ improvements more increase 73. 3. It means there was improvement in every cycle being taught through using jigsaw technique.