The woman called Estefany Benitez has visited to one of her favourite food chains, Hot Burger outlet on Sunday in Santa Cruz de la Sierra.
After chewing something strange, Benitez was horrified and disgusted after she took out the severed human finger.
She shared photos and videos of the rotting finger on Facebook and wrote, "At the moment of eating, I chewed on a FINGER."
She shared video clips of her waiting to speak to a Hot Burger representative on Facebook.
The Hot Burger representative had offered, "Please tell me what you want and we will give it to you."
In one of the video clip, the representative explains that the hamburgers are arrived at the store pre-prepared.
The representative added, "nothing like this has ever happened to us before."
The woman in one of the videos that has been viewed over 60,000 times says, "Here we are at the magnificent Hot Burger where a finger ended up in my burger."
She said that she will post a photo of the finger on social media right away.
In the photo, the top of a finger is seen on the side of the Benitez's plate after she had evidently taken a bite of the burger.