To provide a voice processor and a navigation device which can improve operability.

When a voice recognition button 62 is pressed, a proposal presentation part 68 vocally presents a candidate for an operation indication that a user performs next via a loudspeaker 12. When the user vocally shows an affirmative or an inaffirmative view to the presented candidate for the operation indication, a voice recognition part 64 recognizes the voice to specify a corresponding character string. When a character string, outputted from the voice recognition part 64, is an affirmative such as 'Yes', an operation content setting part 70 sets the operation contents for an operation object device and output it according to the candidate for the operation indication corresponding to the view.