And the teenage striker has claimed he reinforced his plea by hiding secret messages in the 27-year-old's pockets for the midfielder to read after the World Cup.
Mbappe and Kante both played major roles as Les Bleus lifted the trophy in Moscow earlier this month.
Super-rich PSG now want to add Paris-born Kante to their squad as they prepare a major push for the Champions League.
And Mbappe has said he has discussed signing the former Leicester favourite with Parc des Princes president Nasser al-Khelaifi.
The 19-year-old spoke out in an interview with Tuesday's France Football magazine.
Mbappe said: "It is true to say the president asked my advice, and I told him repeatedly that Kante would be good for our team.
"I spoke with N'Golo during the World Cup about him joining us.
"I didn't impose on him, as I know that is the time when players get brainwashed about possible transfers.
"But in the end I put a few written words in his pockets to get the message across to him well.
"He must have found them once he returned home."
PSG signed Mbappe from Monaco last summer, paying around £160million – a world record fee for a teenager.
He helped them win the French domestic treble last season.
Mbappe went on to score four goals in Russia, including one in the 4-2 final win over Croatia, and was named best young player of the tournament.
Kante won the Premier League title with Leicester in 2016, then repeated the feat with Chelsea a year later.
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