Indonesian - English code mixing used in Ika Natassa's novel the architecture of love

Code mixing refers to all cases where lexical items and gramataical features from two languages appear in one sentence. The reason of this research is the emergance of code mixing in Ika Natassa’s novel entitled The Architecture of Love becoming phenomenon which is interesting to be analyzed. The analysis is devided into two problems (1) What types of code mixing found in The Architecture of Love Written by Ika Natassa? And (2) What are the purposes of Indonesian – English code mixing used in The Architecture of Love? The research uses descriptive qualitative method by analyzing data. The researcher uses theories of code mixing from Muysken (2000, p.7-8) types of code mixing and Ohoiwatun (1996, p.71) for the purposes of code mixing. From the data analysis the result shows that The most dominant type of code mixing in Ika Natassa’s novel entitled The Architecture of Love is insertion. Beside, the most dominant purpose of code mixing is prestige feeling motive purpose of code mixing, followed by being more informative purpose of code mixing, expressing self-emotion purpose of code mixing and need feeling motive purpose of code mixing. From the findings of data analysis above, the result of the research can be concluded that in The Architecture of Love novel contains many code mixing, especially insertion type of code mixing because the characters is difficult or could not find the parable words in English into Indonesian. Beside, the purpose of the characters using code mixing is meining that the characters want to show their educational status by speaking billingual