ABSTRACT: This study aims to describe the forms of code mixing in the text of Observation Result Report (ORR) composed by the state vocational school students in Wonogiri. This study is a descriptive qualitative study. The strategy of this study uses content analysis to identify the use of code mixing in ORR composed by the state vocational school students in Wonogiri. The data of the study is in the form of ORR texts composed by the state vocational school students in Wonogiri. The data collection uses observation method with basic techniques of library and interview, and advanced technique, note-taking. The data validation uses theory triangulation and source triangulation. The data analysis technique of the study is inductive by using phenomenology procedures. The result of this study is that there are various forms of code mixing in the text of ORR such as foreign language, regional language, and scientific language.
KEYWORDS : Sociolinguistics, code mixing, Observation Result Report text