To provide a document sharing system capable of sharing an electronic document immediately among participants, even when a wider work space is realized or the number of participants has become increased.

The document sharing system 100 for sharing the document among users has a request part 112 which requests access point servers 30 and 31 specified by addresses of the access point servers 30 and 31 acquired from contactless ID cards 60 to 63 to disclose documents of users who carry the contactless ID cards 60 to 63, when the contactless ID cards 60 to 63 storing the access point servers 30 and 31 for disclosing the document to be shared among the users are recognized. The request part 112 requests the access point servers 30 and 31 to disclose the documents of the users who carry the contactless ID cards 60 to 63 by using an encryption key generated by a key generation part 111.