1. A diagnostic result explanation report generating apparatus, comprising: a diagnostic information storing section for storing diagnostic information, which includes patient specifying information that specifies a patient and diagnostic results for the patient, wherein the diagnostic results include a diagnosed disease of the patient and test results of the patient; a comment information storing section for storing comment information regarding various diagnostic results; a template storing section for storing explanation templates having insertion regions, wherein the explanation templates are prepared for each of the various diseases respectively, and the insertion regions are configured such that at least a portion of the diagnostic information and the comment information is inserted thereto according to each disease; an input section, for inputting patient specifying information of a patient regarding whom a diagnostic result explanation report is to be generated; a diagnostic information obtaining section, for obtaining diagnostic information for a patient from the diagnostic information storing section, based on the input patient specifying information; a template obtaining section, for obtaining an explanation template which is included in the obtained diagnostic information; a comment information obtaining section, for obtaining comment information corresponding to the insertion regions of the obtained explanation template from the comment information storing section; and a diagnostic result explanation report generating section, for determining necessary diagnostic information and comment information obtained from the diagnostic information storing section and the comment information storing section to be information to be inserted into the insertion regions and inserting the determined information to be inserted into the insertion regions of the obtained explanation template, to generate a diagnostic result explanation report.