Apparatus for infusing medical liquid

An apparatus for infusing medical liquid, the apparatus comprising:

• a needle module having at least one needle portion configured to be injected into a user's body;
• a medical liquid storage portion having an inner space to store medical liquid delivered to the needle module, wherein an inner surface of the inner space includes a surface-treated shape, the surface-treated shape of the inner surface including a region including a plurality of protrusions;
• a driving portion connected to the medical liquid storage portion to transfer the medical liquid of the medical liquid storage portion to the needle module, the driving portion including a pump;
• at least one moving portion for moving the medical liquid disposed in the inner space of the medical liquid storage portion;
• and
• a connection portion disposed between the needle module and the medical liquid storage portion, the connection portion including a delivery region with a hollow tube shape;
• wherein the surface-treated shape of the inner surface has the same material as the inner surface of the medical liquid storage portion and is integrated with the inner surface of the medical liquid storage portion.