Bu Pueai (Thai: บุเปือย) is a tambon (subdistrict) located in the central region of Nam Yuen district, in Ubon Ratchathani Province, Thailand.

[1][2][3] In 2022, Tambon Bu Pueai contains 15 villages (Muban; บ้าน or หมู่บ้าน), the same number with administrative community units (Moo or Mu; หมู่).

[1] Neighbouring subdistricts are (clockwise from the south) Si Wichian, Song, Kao Kham, Yang Yai, Ban Tum and Dom Pradit.

[2] It was previously known as "Bu Ra-be" (บุระเบ๊ะ; pronounced in Thai as [bù rá.béː]), which is a Kuy language name made up of two parts: Bu บุ means degraded forest, and Ra-be ระเบ๊ะ refers to the Krabak (Anisoptera costata), an endangered species of plant found in the seasonal tropical forest in the area and is generally called "Pueai" by the Lao-origin people; the village was later renamed "Bu Pueai" in 1944 due to the mentioned reason.

[5] However, nine years after becoming independent, its northernmost area, which consisted of six villages, was split off to form a new subdistrict, Yang Yai.