Pyrgos, 29, has made 18 appearances so far this season after joining the club from Glasgow Warriors in June 2018, and today extends his stay in the capital until at least 2021.
On re-signing with the club, Pyrgos, said: “I’ve thoroughly enjoyed my first season at Edinburgh and I’m excited to sign for two more years.
“I really believe we have the ability to go and achieve success over the next few seasons. I’m looking forward to working hard to make that happen.”
Head Coach Richard Cockerill, added: “Henry is a level headed, gutsy player whose leadership and playmaking abilities are integral to the way we play.
“He offers a great link between our forward pack and backline, so we’re delighted that he will continue to represent this club for the next two seasons.”
Pyrgos has enjoyed a strong first campaign in the capital since making his debut against Ospreys in the 2018/19 Guinness PRO14 season opener.
A natural leader with excellent playmaking abilities, Pyrgos has skippered the capital side on several occasions in club captain Stuart McInally’s absence.
The scrum-half – who was a Guinness PRO12 (now PRO14) winner in 2012 – scored his first try for the club in the 40-14 Heineken Champions Cup victory over RC Toulon at BT Murrayfield.
A former pupil of Bryanston School in Dorset, Henry is eligible for Scotland through his mum, who was born in Grangemouth, while his grandparents were born in Dundee.
Pyrgos made his international debut against New Zealand in the first match of the 2012 Autumn Tests.
The scrum-half scored his first try for Scotland against South Africa in the same campaign and has since gone on to notch up 29 points in 27 matches played for the national side.