The radar apparatus includes a laser light emitting section successively emitting laser lights, a reflection light detecting section receiving, as reflection lights, the laser lights reflected from an object, and generating light reception signals containing reflection signals respectively derived from the reflection lights and having signal levels depending on intensities of the reflection lights, an integrating section generating an integrated signal by integrating the light reception signals, the integrated signal containing the reflection signals being integrated, a phase shifted signal generating section generating a phase shifted signal by delaying the integrated signal by a predetermined time, a differential signal calculating section calculating, as a differential signal, a difference between the integrated signal and the phase-shifted signal, and a detector section detecting the object on the basis of a peak waveform of the differential signal caused by a rising edge of the reflection signals being integrated.