Germany's prolific Miroslav Klose, the all-time World Cup top-scorer, announced his retirement as a player on Tuesday at the age of 38.

The striker, Germany's record scorer with 71 goals in 137 internationals, was without a club after his Lazio contract expired last season and he will now join the national side's coaching staff.

Klose hit a record 16th goal in World Cup finals during the 7-1 semi-final thrashing of hosts Brazil two years ago, which saw him overtake former Brazil star Ronaldo.

Germany went on to win the title in Klose's last game for his country, but he continued in the Italian league with Lazio.

Klose will join Germany's coaching staff after an invitation from head coach Joachim Loew and will be on the bench alongside Loew for the 2018 World Cup qualifier away to San Marino on November 11 and the friendly four days later against Italy in Milan.

"He will complete an individual training programme with the goal of embarking on a coaching career," said the German Football Association (DFB).

“I celebrated my biggest successes in the national team, the time was wonderful and remains unforgettable so I am happy to be able to return to the DFB,” said Poland-born Klose.

“I am very grateful to Jogi Loew and DFB director Hansi Flick for this opportunity and chance to sharpen my practical skills,” he added.

Loew, 56, who extended his contract as head coach until 2020 on Monday, said he was delighted to welcome the “dependable” Klose into his backroom staff.

“He is a role model, as a human being and an athlete, who gives his all for the team and its success,” said Loew, German head coach since 2006.

“We want to support him in the DFB on his path for becoming a coach. I am certain we (the backroom staff), as well as the players, will benefit greatly from his presence and participation,” Loew added.

Klose made his Bundesliga debut in 2000 with Kaiserslautern and went on to play for Werder Bremen, Bayern Munich and Lazio.

He scored 121 goals in 307 matches in Germany's top flight and managed 68 goals in 173 Serie A games during five years with Lazio, who he joined in 2011.

His final appearance for Germany was in the 2014 World Cup final win over Argentina after extra time at Rio de Janeiro's iconic Maracana stadium.

Just before the tournament, he became Germany's all-time top-scorer in a 6-1 warm-up friendly win over Armenia.

He netted his 69th goal to break Gerd Mueller's record of 68 goals, though Mueller's phenomenal feat was in only 62 appearances, for West Germany.