Hermann Hreidarsson has agreed a new one-year deal with Pompey.
The defender made 29 appearances for the Blues last season, a memorable comeback after nearly seven months on the sidelines recovering from a serious Achilles tendon injury.
The Iceland international joined Pompey from Charlton in the summer of 2007, originally penning a two-year contract.
The 36-year-old scored the first of his eight Pompey goals in a thrilling 7-4 win against Reading in September 2007.
His work-rate, toughness and leadership qualities quickly saw him become a firm favourite with Fratton fans.
A member of the 2008 FA Cup winning side, he has made 121 appearances for the Blues.
Hreidarsson began his professional career with Icelandic side IBV before moving to Crystal Palace in 1997. He has also had spells at Brentford, Wimbledon, and Ipswich.
Pompey chief executive David Lampitt said: “We are delighted to have Hermann back for another season.
“Last season Hermann showed great commitment in his return from a serious injury. He embodies everything that is great about Pompey.
“He’s been a big part of this club for the last four years and we’re delighted to have him back.
“His experience, passion and ability to lead will no doubt continue to benefit the side next season."