Pierre Dupuis, 44, was arrested last Friday at his home in Danville, about 140 kilometres east of Montreal.
He was charged with sexual assault, invitation to sexual touching and sexual contact with a minor.
Police said they have reason to believe he may have sexually assaulted victims in Montreal, the Eastern Townships and Gatineau.
They said some of the alleged victims may have been children, but police have not released any further details about the case.
Authorities have released a photo of the accused and are urging victims to come forward.Suggest a correction