An advertisement-section detecting apparatus includes: a captioned-section acquisition unit (12) configured to acquire a captioned section including a caption generated by caption data, on the basis of a temporal position of the caption data; a non-captioned-section acquisition unit (13) configured to acquire a pattern of a non-captioned section that do not include the caption, on the basis of the captioned section; a memory (14) configured to store a broadcasting-program template which is a template corresponding to a broadcasting-program format including a main-section format and a peripheral-section format, and which is used for identifying a pattern of a non-captioned section format including the peripheral-section format; an identifying unit (15) configured to compare the pattern of the non-captioned section and the pattern of the non-captioned section format, and thus to identify the non-captioned section corresponding to the non-captioned section format; and a detector (16) configured to detect a section corresponding to the peripheral-section format as the peripheral section, from the non-captioned section corresponding to the non-captioned section format.