The accused, identified as Erhan G., will face trial over charges of theft and fraud.
He is accused of having received an advance of €785,150 euros in October 2014 from an auction house for the items that had been stolen from the New York apartment of Lennon's widow Yoko Ono.
G. was arrested in Berlin last year. At the time, prosecutors said he had "given a broad confession" in the case.
Beside Lennon's diaries, police last year recovered from the bankrupt Berlin auction house letters, postcards, drawings, a live recording of a Beatles concert, as well as the musician's glasses.
The objects were allegedly stolen by Ono's driver in 2006. The driver, Koral Karsan, lives in Turkey and German police have been unable to detain him.
SEE ALSO: Berlin police recover Lennon items 'stolen by Yoko Ono's driver
The former chauffeur worked for Ono from 1995 to 2006. He already spent 60 days in jail in 2007 in the United States for trying to blackmail Ono.
At the time Berlin prosecutor Michael von Hagen called the find a part of "music history". He said: "We were amazed by what we found."
Prosecutors did not say how G. obtained the stolen objects from Karsan.
Along with co-Beatle Paul McCartney, Lennon wrote some of the Fab Four's biggest hits including "Help" and "With a Little Help from My Friends", before the band split in 1970.
His possessions have since become collectors' items.
A leather jacket supposedly worn by Lennon sold for £10,400 (€11,700) at an auction in England in February.
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