A security policy switching device includes a policy information storage that stores policy setting information and identification information of a policy in correspondence to each other, the policy setting information including setting content of the policy and identification information of a user to whom the policy is attached, a data information storage that stores identification information of data for which a policy is set and identification information of a policy attached to the data in correspondence to each other, and a policy switching unit that switches, in response to a switching request designating identification information of data for which the policy is to be switched and identification information of a user instructing the switch, a policy attached to the data by updating identification information of the policy attached to the data stored in the data information storage with identification information of another policy.