Ekamai International School (EIS) is a private, non-profit, co-educational Christian school (from Pre-Kindergarten to Grade 12) founded and operated by the Seventh-day Adventist Mission in Thailand. It was first established in 1946 as a church school at Phyathai Road and moved to its present location in 1957.

The school name has changed a few times, either due to legal requirements or changing perceptions of what most accurately describes the role of the school.

In 1993 the name change was from Adventist English School to Ekamai International School. Before that year the school operated under a vocational license.

Although EIS mainly serves the Thai community, 33 countries are represented in the student body and English is used as the medium of instruction. The majority of its students comes from different religious backgrounds but the parents are supportive of the religious studies and activities that the school organizes.

The school considers its strong point to be its emphasis on good conduct, character development and teacher’s concern for students. As a Seventh-day Adventist Christian International School, EIS places great emphasis on the role of spiritual values in the personal lives of its students.