Wenger wants Bendtner to be patient and wait for his chance to become an Arsenal regular.
“Have you ever seen a player who is on the bench and not frustrated?” said Wenger.
“When you try to convince a player that he has to be patient, then you waste your time, but that is what you have to do.
“You ask a player if he is fit after two training sessions and he says ‘yes’. That is normal. I was the same.”
The Frenchman added: “I have been very pleased with Nicklas’ attitude and spirit. He has to continued to work, and when he is completely match fit he will play.
“I can understand because he has put a lot of effort in. Now he has to be a little bit patient.
“Nicklas has a good level of confidence and that is not bad, but you have to justify it on the football pitch.
“He is getting sharper in training. He will play games.
“But we are a big club and we have big strikers – you cannot start the season with one striker. You decide and, unfortunately, you can only play 11.”