Siam Center (Thai: สยามเซนเตอร์) is a shopping center in Bangkok, Thailand. It was opened in 1973.
Siam Center was built in 1973 and was one of Bangkok's first shopping malls. It has undergone renovation several times, including after a fire in 1995. In January 11, 2013, Siam Center established the new phase and re-branding itself as Siam Center The Ideaopolis.