There is provided an electronic apparatus that can solve the problem with the prior art that a removable electronic device is removed while the removable electronic device is in operation, leading to unfavorable results. A disk unit is removably attached to the main body of the electronic apparatus and receives at least one removable hard disk as a removable electronic device removably attached thereto. A locking mechanism locks together the disk unit and the main body. A CPU controls the locking mechanism to inhibit the disk unit and the main body from being locked together while the removable hard disk is in operation.