A scanning laser microscope obtains images by performing scanning with laser light. The scanning laser microscope includes scanner and controller. The scanner is applied for performing scanning with the laser light line by line. The controller is applied for calculating a required line scanning time that is required as time used for scanning one line, based on the time required for scanning one frame that is determined from a frame rate being set. The controller is also applied for adjusting at least one of a number of data in one line of drive waveform data for driving the scanner and a read cycle of the drive waveform data, so as to substantially match the time for the scanner to scan one line with the required line scanning time calculated by the controller.