The man was shot at a Sandton restaurant in the early hours of Saturday morning.
According to Netcare 911, the incident at Oxford Street was approximately 2:00.
"Reports from the scene show that an adult man in an alleged robbery has survived a wounded wound in his stomach," said Shawn Herbst, a spokeswoman.
"Due to the seriousness of his injuries, he was examined on the scene by an advanced rescue veterinarian.
"When he was stabilized, the patient was transferred to a hospital in a difficult state for further treatment," said Herbst.
Police spokesman Lieutenant Colonel Lungelo Dlamini confirmed the incident to News24, but could not provide additional information.
– FOLLOW News24 on Twitter