ABSTRACT This research is a descriptive qualitative research in sociolinguistics field. The samples are collected by using purposive sampling technique. The objectives of this research are to find out the forms of code switching used by MTV VJ of MTV Global Room in Global TV and to find out the reasons of using those code switchings by MTV VJ of MTV Global Room in Global TV. Based on the data analysis, the researcher finds two points in this research. The first point is about the forms of code switching used by the hosts in presenting the program. Those forms of code switching are intrasentential switching, intersentential switching and tag switching. The second point is about the reasons of the hosts in using those code switchings when they present that program. The hosts create intrasentential switching because of the familar and simpler words and the use of jargon. Then, the hosts create intersentential switching to clarify, to give information, to express condolence feeling, to express thanks feeling, to introduce guest and to have break time. The last is the hosts insert tag switching when they are speaking because to confirm, as an agreement to play song, to remind the viewers and to make sure the viewers. Finally, it is hoped that this work can be appropriate additional reference for the other researchers who are taking the researches based on the similar data or approach.