Route search device, server device and navigation device

A route search device includes: map data; a derived route acquisition section 512, 14 that acquires a first derived route from an origin point to a destination; a route correction region acquisition section that acquires a route correction region; a place to be passed through setting section 522, 16 that sets a place to be passed through in the route correction region; a start point and end point setting section 522, 16 that sets a start point and an end point in the route correction region; a corrected route acquisition section 512, 15 that acquires a corrected route; and a route correction section 514, 15 that corrects the first derived route to a second derived route from the origin point to the destination, constituted by a route from the origin point to the start point, the corrected route, and a route from the end point to the destination.