INFORMATION MANAGEMENT TERMINAL DEVICE

The invention provides a means for independently and securely managing information by a person or a corporation owning data (referred to as an information owner) with devices such as a smartphone, a PC, and a server. An information management terminal device includes a health information acquisition means (1242), a health information storage means (1243) that stores health information and a healthinformation passbook, and a storage medium (11), in which the storage medium includes a concealed region (111) accessible only by a specific program and a normal region (112) accessible also by programs other than the specific program, the health information acquisition means (1242) adds a date/time record as the health information passbook, the health information storage means (1243) sequentially stores the health information and the health information passbook in the normal region (112), and that the concealed region (111) holds a data alteration detection parameter for detecting alterationof the health information