Provided is a radar apparatus capable of accurately calculating the presence direction of an object. The radar apparatus radiates an electromagnetic wave, receives a reflected wave caused by the electromagnetic wave reflected from the object, and detects the presence direction of the object. The radar apparatus includes: an electromagnetic wave radiating section configured to radiate the electromagnetic wave; a reflected wave reception section configured to receive the reflected wave and detect information about the received reflected wave; and a reflected wave type estimation section configured to determine which the type of the received reflected wave received by the reflected wave reception section is, a single reflected wave which is just reflected from an object, or a composite reflected wave which is composed of a plurality of reflected waves, reflected from different objects, that have interfered with each other, based on the information about the received reflected wave.