Two intruders burst into the property at Avoca Close on Thursday at around 9.30am.
The assailants made off in the direction of the Upper Springfield Road, a police spokeswoman said.
Paul Maskey, Sinn Féin MP for west Belfast, said the man had a "lucky escape".
"The question has to be posed to those who carried out this attack, why have they done it?
"They should come forward and tell the people of this area why they are bringing weapons out in this particular area.
Mr Maskey added: "People in this area want to live in peace and they're asking and wondering why this attack happened."
SDLP Cllr Tim Attwood told UTV local residents were left shocked by the shooting.
He said: "This is a very serious incident which has had a devastating impact on the family in this community.
"This community and the communities across west Belfast want the guns off our streets, and those involved in that type of activity taken off our streets."
"It's left the family very devastated and the community are very shocked by it."
Investigating officers are appealing for witnesses to come forward.
The first assailant is described as around 40-years-old and was wearing a baseball cap, cream coat and dark jeans.
It is believed he was carrying a brown bag containing a shotgun.
The second man is described as being of heavy build and wearing dark jeans, dark blue T-shirt and dark shaved hair.