SLAR (Side Looking Airborne Radar) has advanced to the stage of application to petroleum exploration because of following advantages: wide area coverage in short time, relief exaggeration over low relief area and all-weather, 24 hours operational ability. In this article, basis and criteria of SLAR interpretation and some examples of SLAR geological interpretation of Kalimantan where few geologic data have been available, and some remarks are shown. Even monoscopic mozaic, a lot of closures are found by means of strike ridge trace however it is difficult to identify weather it is anticline or syncline in some cases. Many faults are detectable by clear lineament. Lithology identification is also possible by relief characteristics and drainage analysis. On stereoscopic view, the accuracy of interpretation is improved extremly.