A client information management apparatus comprises a hardware processor. The hardware processor performs: detecting a change in a department where one client member belongs and updating a department about one client member in client information if member name in client personal information is the same as a member name about the one client member registered with the client information and if the department in the client personal information differs from the department about the one client member registered with the client information; referring to the communication information and extracting a member relating to the one client member as an update target member from different client members registered with the client information; and updating a department about the update target member registered with the client information to the same department as the one client member.