To separate and display a plurality of target objects in close proximity in an echo image while reducing capacity of a memory for displaying the echo image. A radar apparatus is provided with a transmitter transmits electromagnetic waves; a receiver receives reflected electromagnetic waves; processing circuitry generates amplitude data of the reflected electromagnetic waves and displacement data indicating velocity or acceleration of the target object, and determines whether a cell of interest corresponds to a boundary cell to divide the target object based on a comparison result between the displacement data of the cell of interest and the displacement data of the cell of interest being close to the cell of interest in an azimuthal direction or a distance direction.