Radar device

A radar device mountable on a present vehicle, the radar device comprising:

• a transmission antenna configured to transmit electromagnetic waves to an object;
• a reception antenna configured to receive waves reflected by said object;
• a detector configured to detect, based on said reflected waves:
• positions of a preceding vehicle and a preceding object traveling in the same direction as the present vehicle, and
• positions of an oncoming vehicle and an oncoming object traveling in a direction opposite to the direction in which said present vehicle is traveling;
• and
• a position comparator configured to:
• judge said preceding object to be the same as said preceding vehicle if the position of said preceding object is in a predetermined preceding vehicle judging range that is determined using the position of said preceding vehicle as a reference, and
• judge said oncoming object to be the same as said oncoming vehicle if the position of said oncoming object is in a predetermined oncoming vehicle judging range that is determined using the position of said oncoming vehicle as a reference,
• wherein said oncoming vehicle judging range is set to be narrower than said preceding vehicle judging range so as not to incorrectly recognize said oncoming object as said oncoming vehicle.