A drug storage container comprising: a first container which includes a first container body including an inner container defining a first space, an outer container provided at an outside of the inner container, the inner container including a first opening provided at an upper end, a second opening provided at a lower end, the first space having a variable volume, and a drug stored in the first space, a first seal member so provided as to close the first opening in a liquid-tight manner, and a second seal member for sealing the second opening; a second container which is used while disposed on a lower side as compared with the first container, and wherein the second container includes a second container body including a third opening provided at an upper end, a second space having a variable volume, and a liquid stored in the second space, and a third seal member for sealing the third opening; and a hollow needle tube which is located between the first space and the second space, and wherein the hollow needle tube pierces through the second seal member and the third seal member to establish a communication between the first space and the second space when the first container and the second container are brought closer to each other; wherein the first space and the second space communicate with each other through the needle tube to reduce a volume of the second space by bringing the first container and the second container closer to each other, so that the liquid flows from the second space into the first space through the needle tube; characterized by a changing part (5, 5') which is provided inside the first space on an upper end side as compared with the second seal member and changes a flow direction of the liquid so that the liquid discharged from the needle tube is not supplied directly to the drug, and the changing part (5, 5') having a flow path, and an elastic plate disposed between the inner container and the outer container, and the flow path is formed in a space secured by the inner container, the outer container and the elastic plate. a first container which includes a first container body including an inner container defining a first space, an outer container provided at an outside of the inner container, the inner container including a first opening provided at an upper end, a second opening provided at a lower end, the first space having a variable volume, and a drug stored in the first space, a first seal member so provided as to close the first opening in a liquid-tight manner, and a second seal member for sealing the second opening; a second container which is used while disposed on a lower side as compared with the first container, and wherein the second container includes a second container body including a third opening provided at an upper end, a second space having a variable volume, and a liquid stored in the second space, and a third seal member for sealing the third opening; and a hollow needle tube which is located between the first space and the second space, and wherein the hollow needle tube pierces through the second seal member and the third seal member to establish a communication between the first space and the second space when the first container and the second container are brought closer to each other; wherein the first space and the second space communicate with each other through the needle tube to reduce a volume of the second space by bringing the first container and the second container closer to each other, so that the liquid flows from the second space into the first space through the needle tube; characterized by a changing part (5, 5') which is provided inside the first space on an upper end side as compared with the second seal member and changes a flow direction of the liquid so that the liquid discharged from the needle tube is not supplied directly to the drug, and the changing part (5, 5') having a flow path, and an elastic plate disposed between the inner container and the outer container, and the flow path is formed in a space secured by the inner container, the outer container and the elastic plate.