Navigation device

A navigation device comprising:

• a next audio output state storage that stores, as a next audio output, an audio output which is to be started next time when one audio output is completed;
• a priority database that holds priorities between said audio outputs and information showing whether or not to store said audio output having a lower one of said priorities in said next audio output state storage;
• a priority holder that acquires and manages said priorities of said audio outputs from said priority database;
• a next audio output state determiner that determines whether or not to output said next audio output stored in said next audio output state storage on a basis of both a storing state of said next audio output in said next audio output state storage, and current navigation information;
• and
• an output determiner that, when a plurality of playback requests each for playback of said audio output coincide, outputs said audio output having a highest one of said priorities acquired from said priority holder, and stores said audio output having a lower one of said priorities other than said audio output having the highest one of said priorities in said next audio output state storage as said next audio output, and that determines said audio output to be played back according to the determination by said next audio output state determiner when said one audio output is completed.