The England international is on course for a January return and, no matter how well Arsenal are playing, Song believes he will add something to the team.
"Jack is a very good player. We need everyone," he told arsenal.com. "When we have everyone in the team we are stronger and more confident. We need every player because we have a lot of games.
"We don't just think about if Jack is coming back. Everybody has their job to do in the team. I hope Jack will come back soon and Bacary as well and when everybody comes, we will see Arsenal playing.
"Jack is a good player, we have good players in the team and everybody is just trying to do their job. We never know who starts the game - the boss makes the choice.
"Today I am very happy and I am very lucky to have good players around me and when Jack comes back he will be welcome in the team. It will be really good for us."