PHARMACEUTICAL LIQUID ADMINISTRATION DEVICE

[Problem] To prevent deterioration of members constituting a connection port during repetition of attaching and detaching operations between an apparatus body and a cradle, and to improve mountability of the apparatus body to the cradle. [Means for Resolution] In a drug solution administration apparatus 100, 110, a connection port 40 includes a port body 41 configured to hold a cannula 50 and be locked to a cradle 30, and a rotating member 421, 424 to which a drug solution supply portion 16, 19 is mounted and that is rotatable, with a direction in which a lumen of the cannula 50 extends as a central axis, in a direction substantially parallel to a placement surface portion 31a, and the rotating member 421, 424 rotates following a rotational movement of an apparatus body 101, 111 substantially parallel to the placement surface portion 31a in a state where the drug solution supply portion 16, 19 is mounted.