The presence of contemporary Javanese songs in the last two decades has become popular in Javanese society. Along with the times, new musical genres were present in the Javanese song scene, including campursari, dangdut koplo, and hip hop. Javanese language has been preserved in contemporary Javanese song lyrics, to show the authenticity of Javanese folk songs. In addition, there is the use of Indonesian in the lyrics of contemporary Javanese songs. The phenomenon of using Indonesian in contemporary Javanese song lyrics is an interesting thing to study. Based on linguistic units, it can be analyzed from the aspects of phonology, morphology, and syntax. Regarding morphological aspects, this study will discuss the reduplication of Indonesian in contemporary Javanese song lyrics. There are three stages of the strategy that were passed in this study, namely the stage of data collection, data analysis, and presentation of the results of data analysis. Data collection through listening to linguistic units in contemporary Javanese song lyrics. The note-taking technique is used to record the results of storing data on the data card in the form of transcription according to the spelling according to the applicable rules. Data analysis was carried out after classified data that was netted, to determine how reduplication in Indonesian is in contemporary Javanese song lyrics. Presentation of the results of data analysis was carried out formally and informally. Based on the research results, it was found that there were four reduplications in Indonesian in the lyrics of contemporary Javanese songs, namely basa-basi, cek-cok, kos-kosan, and sekonyong-konyong. The percentage of the number of reduplications in Indonesian in contemporary Javanese song lyrics is 5.6%. Based on its form, there are two types of reduplication in Indonesian in contemporary Javanese song lyrics, namely repetition with a combination of the process of adding affixes and repetition with phoneme changes. The function of reduplication in Indonesian in contemporary Javanese song lyrics is as verbs, nouns and adverbials. Meanwhile, in terms of the meaning of reduplication in Indonesian in the lyrics of contemporary Javanese songs, it is to express expressions used only for courtesy, quarrels, boarding houses, and suddenly. Keywords: reduplication, Indonesian language, contemporary Javanese song lyrics