A page information collection program for efficiently collecting pages required to verify a web site. When a page acquisition request is input, a page acquisition section acquires the contents of a page and creates page information including the contents of the page and communication information used to acquire the page. Next, a classification section stores the page information put into a group in accordance with an assignment determination condition. If the target page information does not satisfy the assignment determination condition of any group, a grouping section creates an assignment determination condition satisfied by the target page information and a corresponding group, and stores the page information put into the created group. A page acquisition request section outputs a page acquisition request based on the link information in the page information put into the group created by the grouping section, to the page acquisition section.