Pichai Sayotha (born December 24, 1979, พิชัย สายโยธา) is a Thai amateur boxer best known to win lightweight Silver at the World Championships 2003.
In 2003 he had his biggest success at the World Championships in his home country only losing to Mario Kindelan
He didn't participate in 2005 and reached the quarterfinal in 2007 where he lost to Russian favorite Aleksei Tishchenko
but qualified for Beijing.
In 2008 he beat Tishchenko at the Kings Cup.
At the 2008 Olympics he lost his only bout 4:10 to Korean Baik Jong-Sub.