The French international has waded into the diving debate, and slammed the Uruguayan forward for his dirty tricks on the pitch.
Suarez has drawn criticism from Stoke City boss Tony Pulis, Stoke winger Michael Kightly and FIFA vice-president Jim Boyce for a perceived dive against the Potters during their match at Anfield.
And now Koscielny has had his say.
"A striker that I hate to mark? Luis Suarez," Koscielny told L'Equipe. "He is hard to take. He cheats, pulls your shirt and gives you little kicks. You always want to give him a kick but you have to be careful not to be red carded."
Suarez hit back at claims he dives by insisting FIFA chief Boyce was simply looking for publicity, while the Uruguayan FA made it clear they were unhappy with the vilification of their star strayer. The Anfield striker has since insisted that his "conscience is clean."
And Liverpool boss Brendan Rodgers has defended his under-fire forward. The Reds boss feels his striker gets unfairly singled out in the Premier League.
Liverpool and Stoke played out a 0-0 draw at Anfield in the last round of Premier League fixtures, but the spotlight was focussed on Suarez, whose theatrical fall in the penalty area provoked criticism of the former-Ajax man.
No penalty awarded and Suarez was not booked, but the Liverpool striker is perceived to be earning a reputation for diving.
Arsenal defender Koscienly has competed for a place with fellow Gunners' defenders Per Mertesacker and Thomas Vermaelen this season, and the Arsenal defence has started the season in good form.
The Gunners have established a greater solidity to their defensive play, partly inspired by new Arsenal assistant coach Steve Bould.
And Gunners boss Arsene Wenger has praised his defence for their work in the early part of this season.