To provide a post display system, a post display method and a post display program capable of avoiding giving away the content even when a spoiler is posted, a reading terminal (1) functions as a post display system for displaying posted information posted for an electronic book and includes a terminal page management unit (12) and a display restriction unit (14). The terminal page management unit (12) specifies an unread part of the electronic book not read by a user who reads the posted information. The display restriction unit (14) performs control to impose display restrictions on posted information associated with the unread part among posted information associated with any part of the electronic book. An unread part not read by a user is thereby specified, and display restrictions are imposed on posted information associated with the unread part among posted information associated with any part of the electronic book.
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