This research analyzed idiomatic expressions in Friends Season 1 TV Series based on Tan Cheng Lim’s theory (2004). This research aimed to identify the types and the meaning of idiomatic expression found in Friends Season 1 TV Series. The writer designed this research as qualitative content analysis, the data were collected through documentation because the data were taken from the dialogues of the transcript in Friends Season 1 TV Series. This research used data analysis which adopted the stages from Donald Ary (2010), those were preparing and organizing, coding, also interpreting and representing. The results of this research showed that there were 146 idiomatic expression in twelve episodes of Friends Season 1 TV series. The idiomatic expression in twelve episodes of Friends Season 1 TV series have been analyzed in six types; there were 70 phrasal verb, 12 prepositonal phrases, 27 idioms with verbs as keywords, 25 idioms with nouns as keywords, 8 idioms with adjectives as keywords, and 4 idomatic pairs. For some idiomatic expressions, the individual word of the idiom could explicitly showed the meaning, and some could be discovered by knowing the context.