Ottawa police said in a news release that bystanders watched the man climb the memorial around 11:30 p.m. ET Sunday at the intersection of Sparks and Elgin streets.
The man was arrested at the scene and charged with mischief, police said. He appeared in court on Monday.
This is the same memorial where Cpl. Nathan Cirillo was fatally shot last October while on guard.
Guarding the monument has been a key issue since a man was captured on camera urinating on the statue in 2006.