The TV watchdog looked into 44 complaints back from August over remarks Christopher Biggins had made regarding bisexuality.
During his time in the house, Biggins made a number of comments about "the bisexuals", statements that eventually contributed to his removal from the house by show bosses.
"We're investigating whether a contestant's comments about bisexual people were offensive and breached generally accepted standards," a spokesperson for Ofcom announced back in September.
However today the regulator confirmed that the show had been cleared of any wrongdoing.
"We investigated whether a discussion between Christopher Biggins and Renee Graziano about the sexual orientation of bisexual people was offensive," said a spokesperson for Ofcom.
They explained: "We accepted that these remarks made in Celebrity Big Brother were capable of causing offence, but they were likely to be within the audience's expectations of this programme."
The television regulator previously dismissed more than 400 other complaints about this summer's show.
Objections ranged from accusations of race discrimination to footage of sexual material.
During the show back in August, various incidents prompted complaints including Marnie Simpson and Lewis Bloor's naked 'romp' in the shower to Aubrey O'Day spitting in Stephen Bear's food and drink.
There were also Bear's daily pranks and claims of bullying.
While Celebrity Big Brother still notched up almost twice as many complaints as any other programme in August the numbers were actually some of the lowest for the show.
The last series of Celebrity Big Brother back in January finished with a total of 2,025 complaints to Ofcom, and that was 500 down on the previous winter run last year.