With a desire to pray for harmonious rain and wind for crops, Cham Hroi, a group of Cham people in Binh Dinh – Phu Yen has held buffalo pillar ceremony for generations. It is an important ritual that deeply influences Cham community. All of unique value of this event such as fixing stake in the ground, decorating Tet pole… could be discovered in this publication. The book is composed of 3 chapters: - General features about Cham Hroi people. - Buffalo pillar ceremony of Cham Hroi people. - Contribute a part to preserve a traditional festival.