A pharmaceutical injection device may comprise a main body case in the interior of which a pharmaceutical syringe can be mounted; a drive means that is provided inside the main body case and pushes out the pharmaceutical inside the pharmaceutical syringe through a syringe needle; a cover that opens and closes an opening on the side of the main body case where the syringe needle is mounted; an outside air temperature sensor that measures a first temperature, which is the temperature outside the main body case; a display component; and a controller that controls the drive means and the display component and acquires the first temperature at predetermined intervals. When the cover is closed, the controller causes the display component to display information about the storage state of the pharmaceutical in the mounted pharmaceutical syringe on the basis of the first temperature.