This research aimed at finding out; (1) types of code-switching used by English teachers in foreign language classroom, (2) the factors triggering the English teachers to use code-switching in the classroom. The approach which will be used in this study is a mixed qualitative and quantitative method in the design of descriptive research .The samples of the research consisted of one English teacher. In order to gather the data, the researcher used three instruments of research, they were: classroom observation, recorder, and interview. The findings indicated that the types of code-switching were simply found in three types: (a) inter-sentential code-switching (without inserting new information and which inserts new information), (b) intra-sentential codeswitching (translation or word/phrase substitution within a sentence), and (d) tagswitching (interactional fillers code-switching).
Keyword: Code-Switching, types of code switching, mixed qualitative and quantitative.