The pharmaceutical syringe unit includes a cylindrical syringe cover having at one end side thereof a needle mount for an injection needle and a piston-inserting portion at the other end side, and a pharmaceutical syringe configured to be loaded in the syringe cover. The syringe cover includes, on an outer surface thereof, a discrimination mark that is detectable by the pharmaceutical injection device and indicates a type of a drug. The syringe cover includes, on an outer surface thereof, a rotation marker that indicates a rotation direction of the pharmaceutical syringe unit with respect to the main body when the pharmaceutical syringe unit is mounted on the main body.
