A radar apparatus, comprising: a transmitting section that transmits in a first step a transmission wave that is based on a transmission signal toward a target; a receiving section that receives in a second step a reflected wave generated when the transmission wave is reflected on the target, and generates a reception signal; and a target detecting section that calculates in a third step relative velocities of a plurality of detected points on a same target on a basis of the transmission signal and the reception signal, and determines a type of the target on a basis of spread of the relative velocities, characterized in that for the third step: the target detecting section is configured to: cluster the detected points on the same target on the basis of the positions of the detected points, plot the plurality of detected points on XY coordinates to determine an inclination of the cluster consisting of the plurality of the detected points on the XY coordinates; rotate all the plurality of detected points such that the inclination of the cluster becomes zero; and plot the plurality of detected points having rotated coordinates on a plane having a horizontal axis for rotated X coordinates and a vertical axis for the relative velocities and then divide the horizontal axis for rotated X coordinates into a plurality of sections to determine in each section the spread of the relative velocities in the plane a transmitting section that transmits in a first step a transmission wave that is based on a transmission signal toward a target; a receiving section that receives in a second step a reflected wave generated when the transmission wave is reflected on the target, and generates a reception signal; and a target detecting section that calculates in a third step relative velocities of a plurality of detected points on a same target on a basis of the transmission signal and the reception signal, and determines a type of the target on a basis of spread of the relative velocities, characterized in that for the third step: the target detecting section is configured to: cluster the detected points on the same target on the basis of the positions of the detected points, plot the plurality of detected points on XY coordinates to determine an inclination of the cluster consisting of the plurality of the detected points on the XY coordinates; rotate all the plurality of detected points such that the inclination of the cluster becomes zero; and plot the plurality of detected points having rotated coordinates on a plane having a horizontal axis for rotated X coordinates and a vertical axis for the relative velocities and then divide the horizontal axis for rotated X coordinates into a plurality of sections to determine in each section the spread of the relative velocities in the plane the target detecting section is configured to: cluster the detected points on the same target on the basis of the positions of the detected points, plot the plurality of detected points on XY coordinates to determine an inclination of the cluster consisting of the plurality of the detected points on the XY coordinates; rotate all the plurality of detected points such that the inclination of the cluster becomes zero; and plot the plurality of detected points having rotated coordinates on a plane having a horizontal axis for rotated X coordinates and a vertical axis for the relative velocities and then divide the horizontal axis for rotated X coordinates into a plurality of sections to determine in each section plot the plurality of detected points on XY coordinates to determine an inclination of the cluster consisting of the plurality of the detected points on the XY coordinates; rotate all the plurality of detected points such that the inclination of the cluster becomes zero; and plot the plurality of detected points having rotated coordinates on a plane having a horizontal axis for rotated X coordinates and a vertical axis for the relative velocities and then divide the horizontal axis for rotated X coordinates into a plurality of sections to determine in each section the spread of the relative velocities in the plane