The Scottish Fire and Rescue Service says Barry Martin, 38, suffered serious injuries tackling the blaze.
A firefighter who is critically ill in hospital following a fire at the former Jenner’s department store has been named as Barry Martin.
The Scottish Fire and Rescue Service said the 38-year-old from Fife was still in Edinburgh Royal Infirmary with serious injuries.
Four other firefighters were treated in hospital after the blaze and have now been discharged.
Dozens of emergency service crews were sent to the fire on Monday.
A police officer was also treated for smoke inhalation in the hospital before being released.
At its height, 22 fire appliances were at the scene, with more than 100 firefighters working to tackle what Interim Chief Officer Ross Haggart has described as a “serious and complex fire”.
He added: “Our thoughts are very much with Barry and his family, and indeed with all of our colleagues who were injured in responding to this incident.
“We continue to provide all possible support to our colleagues and their families, as well as all staff involved.
“We are liaising with appropriate partners to ensure a full and thorough investigation is undertaken into this incident.”
Interim Chief Officer Haggart added his thanks to his “dedicated crews and staff for their professionalism in responding to this challenging incident”.
Two of the other firefighters who were taken to hospital were treated for smoke inhalation, and two were treated for burns.
One fire engine remains in attendance at the landmark building to monitor for potential hotspots.