The Arsenal manager is a big supporter of England's bid but has been dismayed to see the criticism which saw the Wembley pitch labelled a "disgrace" by Tottenham boss Harry Redknapp following the FA Cup semi-final on Sunday.
Wembley chiefs today admitted that there was justification for the criticism of the standard of pitch for and are reviewing options to improve the surface.
Wenger said: "I saw yesterday that they have relayed it 10 times. It looks like relaying the pitch is not the problem. They have to go deeper into the problem.
"I support personally the campaign for England for the World Cup in 2018. I try to be active on it so I can't imagine that England goes for the bid for the World Cup with a bad pitch. They have to sort out the problem. They have to sort it out.
"I don't know if it would harm England's campaign, I just want to feel comfortable that England have the most renowned football stadium in the world. To have a bad pitch is not acceptable.
"I'm confident that the confederation will sort it out but it cannot remain that everybody complains about the pitch after the game. It's not good enough.
"It is a football country. It is the best league in the world and so what we want to show to the rest of the world is that we have the best pitches in the world."