The purpose of the study was to analyze of English used in job advertisements. The samples of the study included texts in six job advertisements, five types. The instruments consisted of a corpus and a concordancing program, WConcord. The frequency word list was built and it showed that there were 76,576 word types in Job advertisement Corpus. After words with less than 20 occurrences were deleted that there were 144 nouns, 32 verbs, 88 adjectives in the corpus and there were 9 common collocations found in the corpus. The finding in this study indicates the English used in job advertisements and they were collected from different genres. The result presented frequency words that could be involved in people’s life. It made to knows vocabulary about position, detail, qualifications, skills, and benefits.There are several reasons to study about English used in apply for job. This study focused on the English used in advertisements to increase vocabulary that commonly used and learner can apply to use their English knowledge on their own style