The 26-second clip has made Nhlanhla Nene an internet star after it appeared on YouTube and other websites.
He had been answering questions ahead of a mini-budget in the country when his seat collapsed.
A portly Mr Nene looked worried after an audible crack, but managed to stay upright for another 12 seconds before crashing to the floor and out of picture.
The camera then turned back to a surprised looking female newsreader.
But the politician has managed to see the funny side and has asked his colleagues not to say chair when he is around.
(article taken from ITN news report)