The facility, on Marionville Road, will offer the treatments on November 16 to mark World Chronic Obstructive Pulmonary Disease (COPD) Day.
The cave opened in June and has equipment which releases tiny salt particles into the air, helping patients to breathe more easily.
Regular visitor Norma McKinnon said: “If World COPD Day can help people who suffer with the disease it has to be a good thing. So the same goes for the salt cave open day, it will give people the chance to experience the treatment to see what it can do for them.
“The salt cave has certainly helped me a lot, especially with my sinuses. It allows me to breathe so much better through my nose, which makes such a difference.”
To reserve a free session, call 0131-5101 091 or just turn up on the day.