To provide an access control method, device and program that enable access even to a resource requiring user authentication without deteriorating security and enable flexible setting of the accessibility.

A user correspondence holding part 17 manages correspondences between first user information necessary for access to a server 1 and second user information necessary for access to resources. When the server 1 accesses the resource, a user conversion part 16 refers to the correspondences managed in the user correspondence holding part 17 to convert the first user information to the second user information corresponding to the first user information, and accesses the resource with the second user information converted.