A drug injection apparatus includes a drug container, a needle tube having a first needle tip and a second needle tip, a needle-holding portion which holds the central portion of the needle tube, and a drug container mount from which the second needle tip projects. The drug container has a container body, having a contact portion to be penetrated by the second needle tip and a pressing portion that faces the contact portion, wherein the pressing portion is to be pressed toward the contact portion side so as to deform a seal member attached to a portion of the contact portion to be penetrated by the second needle tip, and adapted to be brought into close contact with the circumferential surface of the needle tube in liquid-tight manner and a protective plate adapted to avoid the pressing portion from being penetrated by second needle tip inserted into the container body.
