The present invention relates to unitary bottle for injection, more particularly, to a unitary medicine bottle having an integral structure where a medicine container is easily connected with a plastic container including a solution at a completely sterilized state so that powdered, freeze-dried or liquid medicine is mixed with the solution with one touch for a short time. The unitary medicine bottle for injection according to the present invention comprises: a plastic container equipped with a coupling member connected with a medicine container at one end and a releasing member for releasing a liquid medicine to be at the other end; a protection cap integrally formed with the coupling member to accept the medicine container; and a flue needle which moves forward in a direction of the medicine container and perforates a stopper of the medicine container and is inserted in the coupling member connecting the plastic container with the medicine container.