Guilherme Weisheimer (born October 22, 1981) was a former Brazilian striker.

This biography of a living person needs additional citations for verification. (January 2011)

He began playing football for Gremio youth team from the age of 10. He played for first time to Gremio's senior team in 2000–01, playing at the same team with Ronaldinho. He played 34 games with Gremio, in championship and Cup, and scored 8 goals until December 2002.^[1] In January 2003 he was loan transferred to Criciúma Esporte Clube for 6 months. He returned in the summer of 2003 to his team Gremio, to be again loan transferred to Ulbra (3rd Division team) until December 2003.

In January 2005, he returned to his country to play for the teams Caxias and Veranopolis. One year later, in January 2006 he signed for the Greek club Aris Salonica, to be transferred twelve months later for AC Omonia.