This research is aimed to describe the language attitude of the people of Mandar, a migrant community in Desa Baharu Utara, Kotabaru Regency. The community group chosen as the object of the research is the young generation (Generasi Muda or GM) of Mandar. Therefore, the respondents are 40 people in various age groups consisting of children, adolescents, and adults with an age range of 6-45 years. Data collection of language attitudes was carried out using a questionnaire which was supported by field observations at the research location. It was found on the research location that GM is more proficient in Banjarese Language (Bahasa Banjar or BB) than Mandar (Bahasa Mandar or BM). This is based on the reality that BB is a local language with high prestige. On the other hand, BB has a strategic role as a lingua franca, which is the language of communication between ethnic groups in the Kotabaru area. Meanwhile, BM, which is the language of minority migrants from West Sulawesi, tends to be pushed by BB's domination because it has lost its prestige. As a result, BM experiences a shift from time to time which is feared to lead to extinction. The shift occurs at various linguistic levels, both phonemes, morphemes, and lexicon. The results of field observations indicate that the older generation (Generasi Tua or GT) has a more positive attitude towards BM than the GM of Mandar. The language attitudes include 1) pride in using BM, 2) loyalty to BM related to the level of frequency of using BM, and 3) awareness of BM norms related to linguistic norms and social norms related to BM usage situations and domains of use BM.