President Humala will begin his official tour in Paris, France, with a meeting with the legal team representing Peru in the maritime boundary dispute with Chile before the International Court of Justice in The Hague.
The president's second stop will be Geneva, Switzerland, where he is to attend the 101st session of the International Labour Conference on Monday.
The next day Humala will head to Berlin, Germany, for an official visit that includes a meeting with Chancellor Angela Merkel and his participation in an investment roadshow.
Also on Tuesday, the Peruvian leader will travel to Brussels, Belgium, to meet with European Council President Herman Van Rompuy.
On Wednesday, he is due for talks with Catherine Ashton, EU High Representative for Foreign Affairs and Security Policy and Vice President of the European Commission, and with Martin Schulz, President of the European Parliament, in Strasbourg, France.
President Humala is scheduled to address the European Parliament plenary and will hold a press conference with Schulz the same day.
Before wrapping up his visit, the president will hold a meeting with José Manuel Durão Barroso, President of the European Commission.