Tanasak Srisai (Thai: ธนะศักดิ์ ศรีใส, born September 25, 1989), simply known as Bee (Thai: บี), is a Thai professional football player who plays as a Center Back for Thai Leagues 1 club BEC Tero Sasana. Tanasak’s form with TOT S.C. is impressive and is one of the main players on the team, therefore Buriram United bought him in 2013. At the start of the 2013 season he played well and became the starter of the team for a couple times. He scored his first Buriram goal against Chonburi FC in 2013.
He was called up by Winfried Schäfer to the 2012 King’s Cup. In March 6, 2014, he debuted for Thailand against Lebanon in the 2015 AFC Asian Cup qualification.