A pharmaceutical injection device (1) comprises a main body case (6), a piston (9), a drive motor (15), a controller (14), a memory (19), a communication component (20), and a battery (22). The piston (9) pushes a pharmaceutical contained in the main body case (6) out through an injection needle (10) and into the patient's body. The drive motor (15) drives the piston (9). The controller (14) is connected to the drive motor (15). The memory (19) is connected to the controller (14). The battery (22) supplies power to the drive motor (15), the controller (14), the memory (19), and the communication component (20). The controller (14) receives change data pertaining to the amount of drive by the drive motor (15) from a mobile communication device (2) through the communication unit (20), records the change data in the memory (19), and sends the execution of change data, as the change data reception status, back to the mobile communication device (2) through the communication component (20).
