Constable Mark Murtagh, who was based at Galashiels Police Station, was travelling to work at around 7am yesterday when his motorcycle collided with a bus on the A6105 near Earlston.
Road policing officers are investigating the incident and are appealing for witnesses.
Chief Superintendent Gillian Imery, divisional commander for the Lothian and Borders Division of Police Scotland, said: "It is with the deepest regret that I can confirm that Constable Mark Murtagh, who served in the Lothian and Scottish Borders Division, has died following Friday's accident near Earlston.
"Our sympathies are with his family, friends and colleagues at this very difficult time.
"Road policing officers are continuing their investigation and I would urge any members of the public who witnessed the collision, or whom believe they can assist with this enquiry to contact Police Scotland immediately by calling 101 or anonymously through Crimestoppers on 0800 555 111."
In a statement released through Police Scotland, his family said: "Mark was a caring and loving husband, a devoted father and will be greatly missed.
"We would ask that the media respect our privacy at this difficult time and allow us to grieve in private."