Peerapat Notchaiya (Thai: พีระพัฒน์ โน๊ตชัยยา; rtgs: Phiraphat Notchaiya, born 4 February 1993), simply known as Bas (Thai: บาส) is a Thai professional football player who plays as a Left back for Thai Leagues 1 club Muangthong United and the Thailand national team.
On 27 January 2016 it was announced that Peerapat along with his BEC Tero teammates Tanaboon Kesarat and Chanathip Songkrasin would be joining Muangthong United on loan for the 2016 season.
Peerapat Notchaiya played for Thailand U19, and played in the 2012 AFC U-19 Championship qualification. Peerapat played for Thailand’s first team against China, in a friendly match which Thailand won 5-1. He represented Thailand U23 in the 2013 Southeast Asian Games. He also played for Thailand U23 in the 2014 Asian Games. Peerapat is part of Thailand’s squad in the 2014 AFF Suzuki Cup. In May 2015, he was called up by Thailand to play in the 2018 FIFA World Cup qualification (AFC) against Vietnam. He won the 2015 Southeast Asian Games with Thailand U23.