Abstract Name : Putri Nurul Ulfa Student No. : 1206102020011 Department/Strata : English Education/S1 Title : Investigating of Taboo Language and Euphemism in Pidie Dialect Key words: Taboo language, Taboo word and Euphemism. Taboo words exist in all language and society. The aim of this study is to identify taboo words and euphemistic expressions used in Pidie Jaya society. It also describes the types of taboo words and euphemistic expressions which are used in the society. A qualitative research was used as the method in this study and the data were collected by interviewing eight Pidie Jaya people. The research shows that the taboo language in Pidie Jaya society divided into two; (1) Taboo language based on the domain of speech, and (2) Taboo language based on psychological motivation. Taboo language based on the domain of speech; (a) taboo language related to names of wild animals, (b) taboo language related to sacred animal, (c) taboo language related to name of God, (d) taboo language related to holy Qur’an, (e) taboo language related to name of parents, (f) taboo language related names of family member, relative, and older people, (g) taboo language related the deceased people, (h) taboo language related to shameful or frightening diseases, (i)taboo language related to hunting, (j) taboo language related to selling, (k) taboo word related to ghost or evil sp irit, (l) taboo language forbidden to mention at night, (m) taboo language saying people like animal, (n) taboo language related to the characteristic of animal used to describe human, (o) taboo language related to sexual activity, (p) taboo language relat ed to sensitive parts of body, (q) taboo language related to certain body function, (r) taboo language related to female sexual organ. Reasons for people using taboo language can be categorized based on psychological motivation; taboo of fear, the taboo of delicacy, the taboo of propriety, taboo because of a religious order. In addition, there is six Euphemism used by Pidie J aya society;metaphor, rhyming, circumlocution, omission, hyperbole, and understatement.