The aim of the research is to find the differences production of English stress patterns between the Javanese and Sundanese Brebes dialect speakers of IEC in SMA N 2 Brebes and its implication for the learners. The current study uses qualitative descriptive method. It is carried out in 18th until 29th of March 2019. The research’s subjects are 30 students of IEC which consists of 15 the Javanese and Sundanese. Interview and test are used to find out the research’s problems. The aim of interview is to find out the students’ language background and also the pedagogical implication of this research. The object of this study is the Javanese and Sundanese utterances of 25 words which consist of 2 until 6 syllabic words, and 8 sentences. The result of the research, the word stress differences from 2, 3, 4, 5, and 6 syllabic words are; for the Javanese, they put the stress on the ult, penult, penult, ante-penult, and ult. While the Sundanese put the stress on the penult, ante-penult, ante-penult, ante-penult, and quint-ult. The result of sentence stress patterns is mostly both Javanese and Sundanese Brebes dialect speakers produced in the verb, but the Sundanese tend to produced more than one primary stress in the sentence. They produced 23 times, while the Javanese produced 12 times. Moreover, this research also can be used in pedagogical aim for the learners.