A happiness which is mostly regarded as the people who have lots of money, wealth and luxurious facilities is not always correct. There are lots of people with a lack of money can feel happy. This research was to investigate the nature of happiness and utterances which were used to express happiness. The data of this research were utterances which were taken from the interview with the students of the Islamic boarding school. The informants of this research were 5 students of the Islamic boarding school who dedicate their life to “kyai” and his family. The finding of this research showed that the students felt happy when they could dedicate their life to "kyai” and his family without asking reward from them. They only expected the reward from Alloh through helping them. Most of the students used expressive utterances in expressing their happiness feeling in helping “kyai” and his family.

Keywords : Happiness, utterances, speech act, expressive, Islamic boarding school.