Guntis Valneris (born September 6, 1967 in Riga) is a Latvian draughts player.

Another future World champion, Alexander Schwarzman, was one of the players he defeated at the Soviet U18 championships.

In 1982 Guntis Valneris switched to international draughts, with Emmanuils Merins becoming his new coach.

Under Merins's guidance, Valneris three times in a row won the World Junior Championships.

Then in 1990 he tied for the second place at the World championships with the Dutch master Ton Sijbrands; a re-match for the silver medals was supposed to take place, but Sijbrands forfeited, and Valneris automatically proceeded to the championship match against the defending world champion Alexei Chizhov next year.