1. A sample imaging apparatus comprising: a sample image obtainer for obtaining an image of a sample smeared on a sample holder, the sample holder comprising an identification part which comprises identification information of the sample; an identification detector for detecting the identification information; an identification part image obtainer for obtaining, only when the identification detector can not detect the identification information, an identification part image comprising an image of at least a portion of the identification part; an output device; and a controller for controlling the output device, such that the image of the sample and the identification part image are output when the identification detector can not detect the identification information, and the image of the sample and the identification information are output when the identification information is detected by the information detector.