Thaís Duarte Guedes (born January 20, 1993), commonly known as Thaís Guedes or Thaisinha, is a Brazilian footballer who plays for the South Korean WK League club Hyundai Steel Red Angels and the Brazil national team.
With Brazil's youth teams she competed at the 2008 and 2010 editions of the FIFA U-17 Women's World Cup, as well as the 2012 FIFA U-20 Women's World Cup.
At senior international level she played at the 2011 FIFA Women's World Cup and the 2012 Summer Olympics tournament.
A skilful forward, her playing style has been compared to that of Neymar.