1. A navigation apparatus for performing a route guidance based on a ready-made map data and a learned road data when an own vehicle is traveling, wherein the ready-made map data stores a prestored road, wherein the learned road data stores a learned road, wherein the learned road is generated based on a movement trace of the vehicle from a point where present position of the own vehicle departs from the prestored road or the already-registered learned road to a point where the resent position of the own vehicle returns to the prestored road or the already-registered learned road, the navigation apparatus comprising: a guidance control device that, when a set guidance route passes through a circular intersection, provides a user with a guidance about an exiting road of the circular intersection at a predetermined timing; and a determination device that determines whether or not the learned road in the learned road data is included in connection roads of the circular intersection serving as a guidance target of the guidance control device, wherein the connection roads of the circular intersection are roads connected to the circular intersection, wherein: when the determination device determines that the learned road in the learned road data is not included in the connection roads of the circular intersection, the guidance control device provides the guidance about the circular intersection in an exit number mode; in the exit number mode, the guidance control device provides the guidance about the exiting road of the circular intersection by providing the user with an exit number of the exiting road from among exit numbers of the connection roads of the circular intersection; when the determination device determines that the learned road in the learned road data is included in the connection roads of the circular intersection, the guidance control device provides the guidance about the circular intersection in a learned road guidance mode; in the learned road guidance mode, the guidance control device provides the guidance about the exiting road of the circular intersection without providing the user with the exit number; and the learned road guidance mode is distinct in guidance content from the exit number mode.