The Gunners' captain is also enthused that they haven't been broken in difficult moments.
Arsene Wenger has been quiet so far this summer, with the capture of Petr Cech from rivals Chelsea his only major piece of business so far.
However, he has a big squad available to him having added the likes of Mathieu Debuchy, Calum Chambers, Alexis Sanchez and Danny Welbeck last summer, while Gabriel Paulista also joined the club in the January window.
His squad has also been boosted by the emergence of youngsters such as Hector Bellerin and Francis Coquelin as well and Arteta says it is the best squad in many years, while also praising the unity in the group.
“This is the best group of players in terms of numbers and quality that we have had for many, many years,” he told Arsenal's official website.
“The unity we have is really good as a group. The cohesion we have around the club and with the fans is probably the closest it has been because we had periods when we had difficult times and things weren’t breaking down between anyone.”
“We haven’t broken in difficult moments and that is very important"
Despite a relative lack of action in the transfer market so far this summer, many are predicting that the capture of Cech could push Arsenal closer to a title challenge this summer.
However, they have endured an indifferent start to the campaign so far with an opening day loss to West Ham being followed by an improved, if hardly brilliant, 2-1 defeat of Crystal Palace on Sunday.
Arteta though, says it is important that they haven’t broken in the difficult moments they have faced.
“When you go through difficult moments together, that really helps to get where you want to get to afterwards.” he added.
“We haven’t broken in difficult moments and that is very important. I am really confident in this group - if we maintain it and start adding little things in the next few years then we have a very strong team and club.”